The atomic number of oxygen is 8 because oxygen has?<\/p>\n\n\n\n
8 protons in the nucleus.
electrons in 8 shells.
a second shell with 8 electrons.
an atomic mass of 8.<\/p>\n\n\n\n
The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n The correct answer is: 8 protons in the nucleus.<\/strong><\/p>\n\n\n\n Explanation:<\/strong><\/p>\n\n\n\n The atomic number of an element is determined by the number of protons in its nucleus. For oxygen, this number is 8, meaning it has 8 protons in its nucleus. The atomic number is the fundamental identifier for each element on the periodic table. It is the key property that distinguishes one element from another.<\/p>\n\n\n\n In conclusion, the atomic number of oxygen is 8 because it has 8 protons in its nucleus<\/strong>, which defines the element oxygen in the periodic table.<\/p>\n","protected":false},"excerpt":{"rendered":" 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 : The correct answer is: 8 protons in the nucleus. Explanation: The atomic number of an element is determined by the number […]<\/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-208368","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/208368","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=208368"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/208368\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=208368"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=208368"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=208368"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}The relationship between protons, electrons, and the atomic number:<\/h3>\n\n\n\n
\n
The atomic number directly corresponds to the number of protons in the nucleus of an atom. Oxygen, with an atomic number of 8, has exactly 8 protons. This is a defining characteristic of oxygen. No other element has 8 protons; hence, oxygen is uniquely identified by its atomic number 8.<\/li>\n\n\n\n
In a neutral oxygen atom, the number of protons is equal to the number of electrons. Therefore, oxygen also has 8 electrons. These electrons are arranged in energy levels or shells around the nucleus. Oxygen has two electron shells: the first shell contains 2 electrons, and the second shell contains 6 electrons. The electrons in the outermost shell (valence electrons) are important in determining the chemical reactivity of oxygen.<\/li>\n\n\n\n
Oxygen does not have 8 electron shells; it only has 2. The concept of 8 electrons in an outer shell does apply to elements with higher atomic numbers like neon (which has a full outer shell of 8 electrons), but oxygen itself only has 6 electrons in its second shell.<\/li>\n\n\n\n
The atomic mass of oxygen is approximately 16, not 8. The atomic mass is the sum of protons and neutrons in the nucleus. Since oxygen typically has 8 neutrons in addition to its 8 protons, the mass is about 16 atomic mass units (AMU), which is unrelated to the atomic number.<\/li>\n<\/ol>\n\n\n\n