{"id":211074,"date":"2025-05-02T17:09:47","date_gmt":"2025-05-02T17:09:47","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=211074"},"modified":"2025-05-02T17:09:49","modified_gmt":"2025-05-02T17:09:49","slug":"which-is-an-outer-electron-configuration-of-a-halogen","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/02\/which-is-an-outer-electron-configuration-of-a-halogen\/","title":{"rendered":"Which is an outer electron configuration of a halogen"},"content":{"rendered":"\n<p>Which is an outer electron configuration of a halogen? ns np ns np ns ns2 np<\/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 outer electron configuration of a <strong>halogen<\/strong> is:<\/p>\n\n\n\n<p><strong>ns\u00b2 np\u2075<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation (\u2248300 words):<\/h3>\n\n\n\n<p><strong>Halogens<\/strong> are the elements found in <strong>Group 17 (Group VIIA)<\/strong> of the periodic table. This group includes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Fluorine (F)<\/li>\n\n\n\n<li>Chlorine (Cl)<\/li>\n\n\n\n<li>Bromine (Br)<\/li>\n\n\n\n<li>Iodine (I)<\/li>\n\n\n\n<li>Astatine (At)<\/li>\n\n\n\n<li>Tennessine (Ts)<\/li>\n<\/ul>\n\n\n\n<p>All halogens share a <strong>common outer electron configuration<\/strong> of <strong>ns\u00b2 np\u2075<\/strong>, where:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>n<\/strong> is the principal quantum number corresponding to the period (row) the element is in.<\/li>\n\n\n\n<li><strong>s\u00b2<\/strong> indicates two electrons in the s orbital of the outer shell.<\/li>\n\n\n\n<li><strong>p\u2075<\/strong> indicates five electrons in the p orbital of the same shell.<\/li>\n<\/ul>\n\n\n\n<p>This gives halogens a total of <strong>7 valence electrons<\/strong> (2 in s and 5 in p). Since a full outer shell contains 8 electrons (s\u00b2p\u2076), halogens are <strong>one electron short<\/strong> of a noble gas configuration. This makes them <strong>highly reactive<\/strong>, especially with alkali metals (Group 1), which have a configuration of <strong>ns\u00b9<\/strong> and are eager to lose one electron.<\/p>\n\n\n\n<p>When halogens gain one electron, they achieve the stable <strong>noble gas configuration (ns\u00b2 np\u2076)<\/strong>, becoming negatively charged ions (anions) with a <strong>-1 charge<\/strong>. This high reactivity and tendency to gain one electron underlie many of their chemical properties:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Fluorine (1s\u00b2 2s\u00b2 2p\u2075)<\/strong>: Outer configuration = 2s\u00b2 2p\u2075<\/li>\n\n\n\n<li><strong>Chlorine (3s\u00b2 3p\u2075)<\/strong>: Outer configuration = 3s\u00b2 3p\u2075<\/li>\n\n\n\n<li>and so on\u2026<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Chemical Behavior:<\/h3>\n\n\n\n<p>Due to the <strong>ns\u00b2 np\u2075<\/strong> configuration:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Halogens form salts with metals (e.g., NaCl).<\/li>\n\n\n\n<li>They undergo <strong>oxidation-reduction reactions<\/strong>, often acting as oxidizing agents.<\/li>\n\n\n\n<li>They exhibit trends in reactivity: fluorine is the most reactive; reactivity decreases down the group.<\/li>\n<\/ul>\n\n\n\n<p>In summary, the <strong>ns\u00b2 np\u2075<\/strong> outer configuration defines the halogens\u2019 chemical identity, dictating their valency, reactivity, and place in many essential chemical processes.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Which is an outer electron configuration of a halogen? ns np ns np ns ns2 np The correct answer and explanation is : The correct outer electron configuration of a halogen is: ns\u00b2 np\u2075 Explanation (\u2248300 words): Halogens are the elements found in Group 17 (Group VIIA) of the periodic table. This group includes: All [&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-211074","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/211074","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=211074"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/211074\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=211074"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=211074"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=211074"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}