{"id":211080,"date":"2025-05-03T08:20:06","date_gmt":"2025-05-03T08:20:06","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=211080"},"modified":"2025-05-03T08:20:08","modified_gmt":"2025-05-03T08:20:08","slug":"which-is-an-outer-electron-configuration-of-a-halogen-2","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/03\/which-is-an-outer-electron-configuration-of-a-halogen-2\/","title":{"rendered":"Which is an outer electron configuration of a halogen"},"content":{"rendered":"\n<p>Which is an outer electron configuration of a halogen<\/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><strong>Correct Answer:<\/strong><br>The outer electron configuration of a halogen is <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 (Approx. 300 words):<\/h3>\n\n\n\n<p>Halogens are a group of elements found in <strong>Group 17 (or VIIA)<\/strong> of the periodic table. This group includes <strong>fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At)<\/strong>. All halogens have a similar outer electron configuration, which plays a critical role in their chemical behavior.<\/p>\n\n\n\n<p>The general outer electron configuration of a halogen is <strong>ns\u00b2 np\u2075<\/strong>, where:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>n<\/strong> represents the principal quantum number (energy level) that varies depending on the period (row) in which the element is located.<\/li>\n\n\n\n<li><strong>s\u00b2<\/strong> means two electrons fill the s orbital.<\/li>\n\n\n\n<li><strong>p\u2075<\/strong> means there are five electrons in the p orbital, which can hold a maximum of six.<\/li>\n<\/ul>\n\n\n\n<p>This configuration shows that halogens have <strong>seven valence electrons<\/strong>, just <strong>one electron short of a full octet<\/strong>, which makes them highly reactive, especially with alkali metals and alkaline earth metals, which readily lose electrons.<\/p>\n\n\n\n<p>For example:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Fluorine (F)<\/strong> is in Period 2, so its outer configuration is <strong>2s\u00b2 2p\u2075<\/strong>.<\/li>\n\n\n\n<li><strong>Chlorine (Cl)<\/strong> is in Period 3, with <strong>3s\u00b2 3p\u2075<\/strong>.<\/li>\n\n\n\n<li><strong>Bromine (Br)<\/strong> is in Period 4, with <strong>4s\u00b2 4p\u2075<\/strong>, and so on.<\/li>\n<\/ul>\n\n\n\n<p>This tendency to gain one electron to complete the octet explains why halogens typically form <strong>-1 anions<\/strong> (e.g., Cl\u207b) and why they are so reactive. Their high electronegativity and reactivity decrease as you move down the group due to increasing atomic size and electron shielding.<\/p>\n\n\n\n<p>In summary, the <strong>ns\u00b2 np\u2075<\/strong> configuration makes halogens very reactive nonmetals with strong tendencies to form salts (ionic compounds) and explains much of their chemistry in biological, industrial, and environmental contexts.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Which is an outer electron configuration of a halogen The correct answer and explanation is : Correct Answer:The outer electron configuration of a halogen is ns\u00b2 np\u2075. Explanation (Approx. 300 words): Halogens are a group of elements found in Group 17 (or VIIA) of the periodic table. This group includes fluorine (F), chlorine (Cl), bromine [&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-211080","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/211080","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=211080"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/211080\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=211080"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=211080"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=211080"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}