{"id":238604,"date":"2025-06-18T08:55:18","date_gmt":"2025-06-18T08:55:18","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=238604"},"modified":"2025-06-18T08:55:20","modified_gmt":"2025-06-18T08:55:20","slug":"how-many-valence-electrons-are-in-sc","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/18\/how-many-valence-electrons-are-in-sc\/","title":{"rendered":"How many valence electrons are in Sc"},"content":{"rendered":"\n<p> How many valence electrons are in Sc? What is\/are the orbital(s) the valence electrons are found? d. How many core electrons are in Sc?<\/p>\n\n\n\n<p><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><strong>Answer:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Valence electrons in Scandium (Sc):<\/strong> 3<\/li>\n\n\n\n<li><strong>Orbitals where the valence electrons are found:<\/strong> 4s and 3d<\/li>\n\n\n\n<li><strong>Number of core electrons in Sc:<\/strong> 18<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Explanation:<\/strong><\/p>\n\n\n\n<p>Scandium (Sc) has an atomic number of 21, which means it has 21 electrons in its neutral state. To determine the number of <strong>valence electrons<\/strong>, we look at the electron configuration of scandium.<\/p>\n\n\n\n<p>The <strong>electron configuration of Sc<\/strong> is:<\/p>\n\n\n\n<p><strong>1s\u00b2 2s\u00b2 2p\u2076 3s\u00b2 3p\u2076 4s\u00b2 3d\u00b9<\/strong><\/p>\n\n\n\n<p>From this, we see that the electrons in the <strong>outermost shells<\/strong> are:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Two electrons in the <strong>4s orbital<\/strong><\/li>\n\n\n\n<li>One electron in the <strong>3d orbital<\/strong><\/li>\n<\/ul>\n\n\n\n<p>These are the electrons that participate in bonding and chemical reactions, so they are considered <strong>valence electrons<\/strong>. Therefore, scandium has <strong>three valence electrons<\/strong> in total: two in 4s and one in 3d.<\/p>\n\n\n\n<p>The <strong>core electrons<\/strong> are those that are not involved in bonding and are found in the <strong>inner energy levels<\/strong>. For scandium, the inner (core) electrons are the ones in:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>1s\u00b2 2s\u00b2 2p\u2076 3s\u00b2 3p\u2076<\/li>\n<\/ul>\n\n\n\n<p>These add up to <strong>18 core electrons<\/strong> (2 + 2 + 6 + 2 + 6 = 18).<\/p>\n\n\n\n<p>To summarize:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The <strong>valence shell<\/strong> consists of the <strong>4s and partially filled 3d orbitals<\/strong>.<\/li>\n\n\n\n<li>The <strong>3 valence electrons<\/strong> are located in these orbitals.<\/li>\n\n\n\n<li>The <strong>core electrons<\/strong> are the remaining 18 electrons that fill the first three energy levels.<\/li>\n<\/ul>\n\n\n\n<p>Understanding the distribution of electrons in orbitals helps explain an element\u2019s chemical behavior. Scandium, being a transition metal, often loses its valence electrons to form a +3 oxidation state, which is common in its compounds.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-1039.jpeg\" alt=\"\" class=\"wp-image-238605\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>How many valence electrons are in Sc? What is\/are the orbital(s) the valence electrons are found? d. How many core electrons are in Sc? The Correct Answer and Explanation is: Answer: Explanation: Scandium (Sc) has an atomic number of 21, which means it has 21 electrons in its neutral state. To determine the number of [&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-238604","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/238604","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=238604"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/238604\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=238604"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=238604"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=238604"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}