Question 1:<\/strong><\/h3>\n\n\n\nCorrect Answer:<\/strong>
MEL 1 \u2013 2 electrons; MEL 2 \u2013 8 electrons; MEL 3 \u2013 3 electrons<\/strong><\/p>\n\n\n\n
\n\n\n\nQuestion 2:<\/strong><\/h3>\n\n\n\nCorrect Answer:<\/strong>
Experimentation<\/strong><\/p>\n\n\n\n
\n\n\n\nQuestion 3:<\/strong><\/h3>\n\n\n\nCorrect Answer:<\/strong>
10,206 g<\/strong><\/p>\n\n\n\n
\n\n\n\nExplanation:<\/strong><\/h2>\n\n\n\nQuestion 1: Bohr Theory and Aluminum\u2019s Electron Configuration<\/strong><\/h3>\n\n\n\nBohr\u2019s model of the atom describes electrons as occupying fixed energy levels (also called main energy levels or shells) around the nucleus. These levels are labeled as MEL 1 (K), MEL 2 (L), MEL 3 (M), and so on. Each level has a maximum number of electrons it can hold: MEL 1 can hold up to 2, MEL 2 up to 8, and MEL 3 up to 18, but elements fill these levels based on energy stability and electron configuration rules.<\/p>\n\n\n\n
Aluminum (Al) has an atomic number of 13, meaning it has 13 electrons. According to Bohr\u2019s theory and the Aufbau principle:<\/p>\n\n\n\n
\n- MEL 1 holds 2 electrons,<\/li>\n\n\n\n
- MEL 2 holds 8 electrons,<\/li>\n\n\n\n
- MEL 3 holds the remaining 3 electrons.<\/li>\n<\/ul>\n\n\n\n
So, the electron configuration across main energy levels is:
2, 8, 3<\/strong>.<\/p>\n\n\n\n
\n\n\n\nQuestion 2: Greek Philosophers vs. Modern Scientists<\/strong><\/h3>\n\n\n\nAncient Greek philosophers such as Democritus and Aristotle were among the first to contemplate the nature of matter. However, their approach was primarily based on logic and reasoning<\/strong> without conducting actual experiments. In contrast, modern science<\/strong> relies on a structured process called the scientific method<\/strong>, which includes observation, forming hypotheses, and most importantly, experimentation<\/strong> to test those hypotheses.<\/p>\n\n\n\nThis major distinction\u2014the use of experimentation<\/strong>\u2014is what separates modern scientific study from ancient philosophical speculation.<\/p>\n\n\n\n
\n\n\n\nQuestion 3: Mass from Density and Volume<\/strong><\/h3>\n\n\n\nTo calculate mass from density and volume, use the formula:Mass=Density\u00d7Volume\\text{Mass} = \\text{Density} \\times \\text{Volume}Mass=Density\u00d7Volume<\/p>\n\n\n\n
Given:<\/p>\n\n\n\n
\n- Density = 8.10 g\/cm\u00b3<\/li>\n\n\n\n
- Volume = 1.26 L = 1260 cm\u00b3 (since 1 L = 1000 cm\u00b3)<\/li>\n<\/ul>\n\n\n\n
Mass=8.10\u2009g\/cm3\u00d71260\u2009cm3=10,206\u2009g\\text{Mass} = 8.10 \\, \\text{g\/cm}^3 \\times 1260 \\, \\text{cm}^3 = 10,206 \\, \\text{g}Mass=8.10g\/cm3\u00d71260cm3=10,206g<\/p>\n\n\n\n
So the correct mass is 10,206 grams<\/strong>.<\/p>\n\n\n\n![\"\"](\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner7-401.jpeg\")
<\/figure>\n","protected":false},"excerpt":{"rendered":"Applying the Bohr Theory, which of the following represents the electron composition of the main energy levels (MEL) for aluminum? (Main energy level is equivalent in terminology to main shell.) MEL 1 \u2013 2 electrons; MEL 2 \u2013 8 electrons; Mel 3 \u2013 8 electrons MEL 1 \u2013 2 electrons; MEL 2 \u2013 8 electrons; […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-232760","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/232760","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=232760"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/232760\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=232760"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=232760"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=232760"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
MEL 1 \u2013 2 electrons; MEL 2 \u2013 8 electrons; MEL 3 \u2013 3 electrons<\/strong><\/p>\n\n\n\n
\n\n\n\n
Question 2:<\/strong><\/h3>\n\n\n\nCorrect Answer:<\/strong>
Experimentation<\/strong><\/p>\n\n\n\n
\n\n\n\nQuestion 3:<\/strong><\/h3>\n\n\n\nCorrect Answer:<\/strong>
10,206 g<\/strong><\/p>\n\n\n\n
\n\n\n\nExplanation:<\/strong><\/h2>\n\n\n\nQuestion 1: Bohr Theory and Aluminum\u2019s Electron Configuration<\/strong><\/h3>\n\n\n\nBohr\u2019s model of the atom describes electrons as occupying fixed energy levels (also called main energy levels or shells) around the nucleus. These levels are labeled as MEL 1 (K), MEL 2 (L), MEL 3 (M), and so on. Each level has a maximum number of electrons it can hold: MEL 1 can hold up to 2, MEL 2 up to 8, and MEL 3 up to 18, but elements fill these levels based on energy stability and electron configuration rules.<\/p>\n\n\n\n
Aluminum (Al) has an atomic number of 13, meaning it has 13 electrons. According to Bohr\u2019s theory and the Aufbau principle:<\/p>\n\n\n\n
\n- MEL 1 holds 2 electrons,<\/li>\n\n\n\n
- MEL 2 holds 8 electrons,<\/li>\n\n\n\n
- MEL 3 holds the remaining 3 electrons.<\/li>\n<\/ul>\n\n\n\n
So, the electron configuration across main energy levels is:
2, 8, 3<\/strong>.<\/p>\n\n\n\n
\n\n\n\nQuestion 2: Greek Philosophers vs. Modern Scientists<\/strong><\/h3>\n\n\n\nAncient Greek philosophers such as Democritus and Aristotle were among the first to contemplate the nature of matter. However, their approach was primarily based on logic and reasoning<\/strong> without conducting actual experiments. In contrast, modern science<\/strong> relies on a structured process called the scientific method<\/strong>, which includes observation, forming hypotheses, and most importantly, experimentation<\/strong> to test those hypotheses.<\/p>\n\n\n\nThis major distinction\u2014the use of experimentation<\/strong>\u2014is what separates modern scientific study from ancient philosophical speculation.<\/p>\n\n\n\n
\n\n\n\nQuestion 3: Mass from Density and Volume<\/strong><\/h3>\n\n\n\nTo calculate mass from density and volume, use the formula:Mass=Density\u00d7Volume\\text{Mass} = \\text{Density} \\times \\text{Volume}Mass=Density\u00d7Volume<\/p>\n\n\n\n
Given:<\/p>\n\n\n\n
\n- Density = 8.10 g\/cm\u00b3<\/li>\n\n\n\n
- Volume = 1.26 L = 1260 cm\u00b3 (since 1 L = 1000 cm\u00b3)<\/li>\n<\/ul>\n\n\n\n
Mass=8.10\u2009g\/cm3\u00d71260\u2009cm3=10,206\u2009g\\text{Mass} = 8.10 \\, \\text{g\/cm}^3 \\times 1260 \\, \\text{cm}^3 = 10,206 \\, \\text{g}Mass=8.10g\/cm3\u00d71260cm3=10,206g<\/p>\n\n\n\n
So the correct mass is 10,206 grams<\/strong>.<\/p>\n\n\n\n<\/figure>\n","protected":false},"excerpt":{"rendered":"Applying the Bohr Theory, which of the following represents the electron composition of the main energy levels (MEL) for aluminum? (Main energy level is equivalent in terminology to main shell.) MEL 1 \u2013 2 electrons; MEL 2 \u2013 8 electrons; Mel 3 \u2013 8 electrons MEL 1 \u2013 2 electrons; MEL 2 \u2013 8 electrons; […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-232760","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/232760","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=232760"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/232760\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=232760"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=232760"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=232760"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Experimentation<\/strong><\/p>\n\n\n\n
\n\n\n\n
Question 3:<\/strong><\/h3>\n\n\n\nCorrect Answer:<\/strong>
10,206 g<\/strong><\/p>\n\n\n\n
\n\n\n\nExplanation:<\/strong><\/h2>\n\n\n\nQuestion 1: Bohr Theory and Aluminum\u2019s Electron Configuration<\/strong><\/h3>\n\n\n\nBohr\u2019s model of the atom describes electrons as occupying fixed energy levels (also called main energy levels or shells) around the nucleus. These levels are labeled as MEL 1 (K), MEL 2 (L), MEL 3 (M), and so on. Each level has a maximum number of electrons it can hold: MEL 1 can hold up to 2, MEL 2 up to 8, and MEL 3 up to 18, but elements fill these levels based on energy stability and electron configuration rules.<\/p>\n\n\n\n
Aluminum (Al) has an atomic number of 13, meaning it has 13 electrons. According to Bohr\u2019s theory and the Aufbau principle:<\/p>\n\n\n\n
\n- MEL 1 holds 2 electrons,<\/li>\n\n\n\n
- MEL 2 holds 8 electrons,<\/li>\n\n\n\n
- MEL 3 holds the remaining 3 electrons.<\/li>\n<\/ul>\n\n\n\n
So, the electron configuration across main energy levels is:
2, 8, 3<\/strong>.<\/p>\n\n\n\n
\n\n\n\nQuestion 2: Greek Philosophers vs. Modern Scientists<\/strong><\/h3>\n\n\n\nAncient Greek philosophers such as Democritus and Aristotle were among the first to contemplate the nature of matter. However, their approach was primarily based on logic and reasoning<\/strong> without conducting actual experiments. In contrast, modern science<\/strong> relies on a structured process called the scientific method<\/strong>, which includes observation, forming hypotheses, and most importantly, experimentation<\/strong> to test those hypotheses.<\/p>\n\n\n\nThis major distinction\u2014the use of experimentation<\/strong>\u2014is what separates modern scientific study from ancient philosophical speculation.<\/p>\n\n\n\n
\n\n\n\nQuestion 3: Mass from Density and Volume<\/strong><\/h3>\n\n\n\nTo calculate mass from density and volume, use the formula:Mass=Density\u00d7Volume\\text{Mass} = \\text{Density} \\times \\text{Volume}Mass=Density\u00d7Volume<\/p>\n\n\n\n
Given:<\/p>\n\n\n\n
\n- Density = 8.10 g\/cm\u00b3<\/li>\n\n\n\n
- Volume = 1.26 L = 1260 cm\u00b3 (since 1 L = 1000 cm\u00b3)<\/li>\n<\/ul>\n\n\n\n
Mass=8.10\u2009g\/cm3\u00d71260\u2009cm3=10,206\u2009g\\text{Mass} = 8.10 \\, \\text{g\/cm}^3 \\times 1260 \\, \\text{cm}^3 = 10,206 \\, \\text{g}Mass=8.10g\/cm3\u00d71260cm3=10,206g<\/p>\n\n\n\n
So the correct mass is 10,206 grams<\/strong>.<\/p>\n\n\n\n<\/figure>\n","protected":false},"excerpt":{"rendered":"Applying the Bohr Theory, which of the following represents the electron composition of the main energy levels (MEL) for aluminum? (Main energy level is equivalent in terminology to main shell.) MEL 1 \u2013 2 electrons; MEL 2 \u2013 8 electrons; Mel 3 \u2013 8 electrons MEL 1 \u2013 2 electrons; MEL 2 \u2013 8 electrons; […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-232760","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/232760","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=232760"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/232760\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=232760"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=232760"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=232760"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
10,206 g<\/strong><\/p>\n\n\n\n
\n\n\n\n
Explanation:<\/strong><\/h2>\n\n\n\nQuestion 1: Bohr Theory and Aluminum\u2019s Electron Configuration<\/strong><\/h3>\n\n\n\nBohr\u2019s model of the atom describes electrons as occupying fixed energy levels (also called main energy levels or shells) around the nucleus. These levels are labeled as MEL 1 (K), MEL 2 (L), MEL 3 (M), and so on. Each level has a maximum number of electrons it can hold: MEL 1 can hold up to 2, MEL 2 up to 8, and MEL 3 up to 18, but elements fill these levels based on energy stability and electron configuration rules.<\/p>\n\n\n\n
Aluminum (Al) has an atomic number of 13, meaning it has 13 electrons. According to Bohr\u2019s theory and the Aufbau principle:<\/p>\n\n\n\n
\n- MEL 1 holds 2 electrons,<\/li>\n\n\n\n
- MEL 2 holds 8 electrons,<\/li>\n\n\n\n
- MEL 3 holds the remaining 3 electrons.<\/li>\n<\/ul>\n\n\n\n
So, the electron configuration across main energy levels is:
2, 8, 3<\/strong>.<\/p>\n\n\n\n
\n\n\n\nQuestion 2: Greek Philosophers vs. Modern Scientists<\/strong><\/h3>\n\n\n\nAncient Greek philosophers such as Democritus and Aristotle were among the first to contemplate the nature of matter. However, their approach was primarily based on logic and reasoning<\/strong> without conducting actual experiments. In contrast, modern science<\/strong> relies on a structured process called the scientific method<\/strong>, which includes observation, forming hypotheses, and most importantly, experimentation<\/strong> to test those hypotheses.<\/p>\n\n\n\nThis major distinction\u2014the use of experimentation<\/strong>\u2014is what separates modern scientific study from ancient philosophical speculation.<\/p>\n\n\n\n
\n\n\n\nQuestion 3: Mass from Density and Volume<\/strong><\/h3>\n\n\n\nTo calculate mass from density and volume, use the formula:Mass=Density\u00d7Volume\\text{Mass} = \\text{Density} \\times \\text{Volume}Mass=Density\u00d7Volume<\/p>\n\n\n\n
Given:<\/p>\n\n\n\n
\n- Density = 8.10 g\/cm\u00b3<\/li>\n\n\n\n
- Volume = 1.26 L = 1260 cm\u00b3 (since 1 L = 1000 cm\u00b3)<\/li>\n<\/ul>\n\n\n\n
Mass=8.10\u2009g\/cm3\u00d71260\u2009cm3=10,206\u2009g\\text{Mass} = 8.10 \\, \\text{g\/cm}^3 \\times 1260 \\, \\text{cm}^3 = 10,206 \\, \\text{g}Mass=8.10g\/cm3\u00d71260cm3=10,206g<\/p>\n\n\n\n
So the correct mass is 10,206 grams<\/strong>.<\/p>\n\n\n\n<\/figure>\n","protected":false},"excerpt":{"rendered":"Applying the Bohr Theory, which of the following represents the electron composition of the main energy levels (MEL) for aluminum? (Main energy level is equivalent in terminology to main shell.) MEL 1 \u2013 2 electrons; MEL 2 \u2013 8 electrons; Mel 3 \u2013 8 electrons MEL 1 \u2013 2 electrons; MEL 2 \u2013 8 electrons; […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-232760","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/232760","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=232760"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/232760\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=232760"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=232760"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=232760"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Bohr\u2019s model of the atom describes electrons as occupying fixed energy levels (also called main energy levels or shells) around the nucleus. These levels are labeled as MEL 1 (K), MEL 2 (L), MEL 3 (M), and so on. Each level has a maximum number of electrons it can hold: MEL 1 can hold up to 2, MEL 2 up to 8, and MEL 3 up to 18, but elements fill these levels based on energy stability and electron configuration rules.<\/p>\n\n\n\n
Aluminum (Al) has an atomic number of 13, meaning it has 13 electrons. According to Bohr\u2019s theory and the Aufbau principle:<\/p>\n\n\n\n
- \n
- MEL 1 holds 2 electrons,<\/li>\n\n\n\n
- MEL 2 holds 8 electrons,<\/li>\n\n\n\n
- MEL 3 holds the remaining 3 electrons.<\/li>\n<\/ul>\n\n\n\n
So, the electron configuration across main energy levels is:
2, 8, 3<\/strong>.<\/p>\n\n\n\n
\n\n\n\nQuestion 2: Greek Philosophers vs. Modern Scientists<\/strong><\/h3>\n\n\n\n
Ancient Greek philosophers such as Democritus and Aristotle were among the first to contemplate the nature of matter. However, their approach was primarily based on logic and reasoning<\/strong> without conducting actual experiments. In contrast, modern science<\/strong> relies on a structured process called the scientific method<\/strong>, which includes observation, forming hypotheses, and most importantly, experimentation<\/strong> to test those hypotheses.<\/p>\n\n\n\n
This major distinction\u2014the use of experimentation<\/strong>\u2014is what separates modern scientific study from ancient philosophical speculation.<\/p>\n\n\n\n
\n\n\n\nQuestion 3: Mass from Density and Volume<\/strong><\/h3>\n\n\n\n
To calculate mass from density and volume, use the formula:Mass=Density\u00d7Volume\\text{Mass} = \\text{Density} \\times \\text{Volume}Mass=Density\u00d7Volume<\/p>\n\n\n\n
Given:<\/p>\n\n\n\n
- \n
- Density = 8.10 g\/cm\u00b3<\/li>\n\n\n\n
- Volume = 1.26 L = 1260 cm\u00b3 (since 1 L = 1000 cm\u00b3)<\/li>\n<\/ul>\n\n\n\n
Mass=8.10\u2009g\/cm3\u00d71260\u2009cm3=10,206\u2009g\\text{Mass} = 8.10 \\, \\text{g\/cm}^3 \\times 1260 \\, \\text{cm}^3 = 10,206 \\, \\text{g}Mass=8.10g\/cm3\u00d71260cm3=10,206g<\/p>\n\n\n\n
So the correct mass is 10,206 grams<\/strong>.<\/p>\n\n\n\n
<\/figure>\n","protected":false},"excerpt":{"rendered":"Applying the Bohr Theory, which of the following represents the electron composition of the main energy levels (MEL) for aluminum? (Main energy level is equivalent in terminology to main shell.) MEL 1 \u2013 2 electrons; MEL 2 \u2013 8 electrons; Mel 3 \u2013 8 electrons MEL 1 \u2013 2 electrons; MEL 2 \u2013 8 electrons; […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-232760","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/232760","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=232760"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/232760\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=232760"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=232760"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=232760"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}