{"id":214016,"date":"2025-05-13T09:44:53","date_gmt":"2025-05-13T09:44:53","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=214016"},"modified":"2025-05-13T09:44:55","modified_gmt":"2025-05-13T09:44:55","slug":"the-atomic-number-of-oxygen-is-8-because-oxygen-has-10","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/13\/the-atomic-number-of-oxygen-is-8-because-oxygen-has-10\/","title":{"rendered":"The atomic number of oxygen is 8 because oxygen has"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The atomic number of oxygen is 8 because oxygen has?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">8 protons in the nucleus.<br>electrons in 8 shells.<br>a second shell with 8 electrons.<br>an atomic mass of 8.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-0-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Correct Answer: 8 protons in the nucleus.<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\">The atomic number of an element is defined by the number of <strong>protons<\/strong> in the nucleus of one of its atoms. In the case of oxygen, its atomic number is <strong>8<\/strong>, which means that each oxygen atom contains <strong>8 protons<\/strong> in its nucleus. This is a fundamental property that defines the element; if an atom had more or fewer protons, it would no longer be oxygen but a different element entirely.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Let\u2019s break down why the other answer choices are incorrect:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Electrons in 8 shells<\/strong>: This is not true for oxygen. Oxygen only has <strong>two electron shells<\/strong>. The first shell can hold up to 2 electrons, and the second can hold up to 8. Oxygen, with 8 electrons, fills the first shell with 2 electrons and places the remaining 6 in the second shell. Therefore, it does <strong>not<\/strong> have electrons in 8 shells.<\/li>\n\n\n\n<li><strong>A second shell with 8 electrons<\/strong>: This is also incorrect. Oxygen\u2019s second shell holds <strong>6 electrons<\/strong>, not 8. An atom with 8 electrons in its second shell would be neon, which has an atomic number of 10. Oxygen is two electrons short of a full second shell, which is why it tends to form bonds with other atoms\u2014to fill that shell and become more stable.<\/li>\n\n\n\n<li><strong>An atomic mass of 8<\/strong>: This is also incorrect. Oxygen has an <strong>atomic mass of approximately 16 atomic mass units (amu)<\/strong>. This mass is due to the sum of its 8 protons and 8 neutrons (on average). The atomic number is not determined by the atomic mass.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">To summarize, <strong>the atomic number of oxygen is 8 because it has 8 protons in its nucleus<\/strong>. The atomic number is a key identifier for elements on the periodic table and is always equal to the number of protons in the atom. This number also determines the number of electrons in a neutral atom, which in turn affects the atom&#8217;s chemical behavior.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The atomic number of oxygen is 8 because oxygen has? 8 protons in the nucleus.electrons in 8 shells.a second shell with 8 electrons.an atomic mass of 8. The Correct Answer and Explanation is: Correct Answer: 8 protons in the nucleus. The atomic number of an element is defined by the number of protons in the [&hellip;]<\/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-214016","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/214016","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=214016"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/214016\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=214016"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=214016"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=214016"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}