{"id":207319,"date":"2025-04-21T13:25:32","date_gmt":"2025-04-21T13:25:32","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=207319"},"modified":"2025-04-21T13:25:35","modified_gmt":"2025-04-21T13:25:35","slug":"the-atomic-number-of-oxygen-is-8-because-oxygen-has-4","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/04\/21\/the-atomic-number-of-oxygen-is-8-because-oxygen-has-4\/","title":{"rendered":"The atomic number of oxygen is 8 because oxygen has"},"content":{"rendered":"\n<p>The atomic number of oxygen is 8 because oxygen has?<\/p>\n\n\n\n<p>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><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n<p>The correct answer is:<\/p>\n\n\n\n<p><strong>Oxygen has 8 protons in the nucleus.<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>The <strong>atomic number<\/strong> of an element is defined as the number of <strong>protons<\/strong> in its nucleus. This number is unique to each element and determines the element&#8217;s identity. For oxygen, the atomic number is <strong>8<\/strong>, which means it has <strong>8 protons<\/strong> in its nucleus.<\/p>\n\n\n\n<p>In addition to protons, oxygen also has <strong>electrons<\/strong> orbiting its nucleus. In a neutral atom, the number of electrons equals the number of protons. So, oxygen has <strong>8 electrons<\/strong>. These electrons are arranged in shells or energy levels around the nucleus, but the number of electrons doesn\u2019t directly determine the atomic number.<\/p>\n\n\n\n<p>Now, let&#8217;s address the other options:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Electrons in 8 shells<\/strong>: This is incorrect. Electrons are arranged in shells around the nucleus, but oxygen only has <strong>2 electron shells<\/strong>. The first shell holds 2 electrons, and the second shell holds 6 electrons, adding up to the 8 electrons total. There are not 8 shells in oxygen&#8217;s electron configuration.<\/li>\n\n\n\n<li><strong>A second shell with 8 electrons<\/strong>: This is also incorrect. The second shell in oxygen&#8217;s electron configuration has only <strong>6 electrons<\/strong>. The first shell holds 2 electrons, while the second shell holds 6, not 8.<\/li>\n\n\n\n<li><strong>An atomic mass of 8<\/strong>: This is incorrect as well. The atomic mass of oxygen is approximately <strong>16 atomic mass units (amu)<\/strong>, not 8. The atomic mass is approximately the sum of protons and neutrons in the nucleus. While oxygen has 8 protons, it usually has <strong>8 neutrons<\/strong>, giving it an atomic mass of about 16.<\/li>\n<\/ul>\n\n\n\n<p>Therefore, the atomic number of oxygen is <strong>8<\/strong> because it has <strong>8 protons<\/strong> in its nucleus, making it oxygen and giving it its chemical properties.<\/p>\n\n\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 : The correct answer is: Oxygen has 8 protons in the nucleus. Explanation: The atomic number of an element is defined as [&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-207319","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/207319","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=207319"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/207319\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=207319"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=207319"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=207319"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}