{"id":264131,"date":"2025-07-21T11:21:35","date_gmt":"2025-07-21T11:21:35","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=264131"},"modified":"2025-07-21T11:21:37","modified_gmt":"2025-07-21T11:21:37","slug":"what-is-the-electron-configuration-ar3d4-for-mn3","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/21\/what-is-the-electron-configuration-ar3d4-for-mn3\/","title":{"rendered":"What is the electron configuration [Ar]3d4 for Mn3+"},"content":{"rendered":"\n<p>What is the electron configuration [Ar]3d4 for Mn3+? a) [Ar]4s23d7 b) [Ar]4s13d5 c) [Ar]4s2342 d) [Ar]3d3<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>The correct electron configuration for Mn3+\\text{Mn}^{3+}Mn3+ is <strong>[Ar] 3d\u2074<\/strong>.<\/p>\n\n\n\n<p>Let\u2019s break it down:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Manganese (Mn)<\/strong> has an atomic number of 25, which means its neutral atom configuration is:\n<ul class=\"wp-block-list\">\n<li>1s\u00b2 2s\u00b2 2p\u2076 3s\u00b2 3p\u2076 3d\u2075 4s\u00b2.<\/li>\n\n\n\n<li>The electron configuration of Mn in its ground state would be: <strong>[Ar] 3d\u2075 4s\u00b2<\/strong>.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Mn\u00b3+<\/strong> means that the manganese ion has lost three electrons. When an atom ionizes to form a positive ion, the electrons are typically lost from the outermost shell first. In this case, the 4s electrons are removed first, followed by the 3d electrons:\n<ul class=\"wp-block-list\">\n<li>Start with the neutral configuration: <strong>[Ar] 3d\u2075 4s\u00b2<\/strong>.<\/li>\n\n\n\n<li>Remove two electrons from the 4s orbital: <strong>[Ar] 3d\u2075<\/strong>.<\/li>\n\n\n\n<li>Remove one more electron from the 3d orbital: <strong>[Ar] 3d\u2074<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>Therefore, the electron configuration for <strong>Mn\u00b3+<\/strong> is <strong>[Ar] 3d\u2074<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>4s electrons<\/strong> are removed before the 3d electrons because the 4s orbital is higher in energy.<\/li>\n\n\n\n<li>After the removal of three electrons, the remaining configuration for the ion has a total of 22 electrons, which matches the expected number for Mn\u00b3+ (the neutral Mn atom has 25 electrons).<\/li>\n<\/ul>\n\n\n\n<p>Now, examining the choices:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>a) <strong>[Ar] 4s\u00b2 3d\u2077<\/strong>: This is the electron configuration for a neutral Mn atom, not the Mn3+\\text{Mn}^{3+}Mn3+ ion.<\/li>\n\n\n\n<li>b) <strong>[Ar] 4s\u00b9 3d\u2075<\/strong>: This could be the configuration of Mn\u00b2+, but it\u2019s not correct for Mn\u00b3+.<\/li>\n\n\n\n<li>c) <strong>[Ar] 4s\u00b2 3d\u2074<\/strong>: Incorrect, as the 4s orbital is fully occupied before the 3d orbital.<\/li>\n\n\n\n<li>d) <strong>[Ar] 3d\u00b3<\/strong>: This would correspond to Mn4+\\text{Mn}^{4+}Mn4+, not Mn3+\\text{Mn}^{3+}Mn3+.<\/li>\n<\/ul>\n\n\n\n<p>Thus, <strong>[Ar] 3d\u2074<\/strong> is the correct electron configuration for Mn3+\\text{Mn}^{3+}Mn3+.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/07\/learnexams-banner6-1371.jpeg\" alt=\"\" class=\"wp-image-264150\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>What is the electron configuration [Ar]3d4 for Mn3+? a) [Ar]4s23d7 b) [Ar]4s13d5 c) [Ar]4s2342 d) [Ar]3d3 The Correct Answer and Explanation is: The correct electron configuration for Mn3+\\text{Mn}^{3+}Mn3+ is [Ar] 3d\u2074. Let\u2019s break it down: Therefore, the electron configuration for Mn\u00b3+ is [Ar] 3d\u2074. Explanation: Now, examining the choices: Thus, [Ar] 3d\u2074 is the correct [&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-264131","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/264131","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=264131"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/264131\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=264131"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=264131"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=264131"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}