{"id":254253,"date":"2025-07-12T12:26:43","date_gmt":"2025-07-12T12:26:43","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=254253"},"modified":"2025-07-12T12:26:45","modified_gmt":"2025-07-12T12:26:45","slug":"how-many-electrons-are-in-the-iron-ion-of-k3fecn6","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/12\/how-many-electrons-are-in-the-iron-ion-of-k3fecn6\/","title":{"rendered":"How many electrons are in the iron ion of K3[Fe(CN)6]"},"content":{"rendered":"\n<p>How many  electrons are in the iron ion of K3[Fe(CN)6]? <\/p>\n\n\n\n<p>A) 3 <\/p>\n\n\n\n<p>B) 5 <\/p>\n\n\n\n<p>C) 6 <\/p>\n\n\n\n<p>D) 7 <\/p>\n\n\n\n<p>E) 4<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\">The correct answer and explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>The correct answer is <strong>B) 5<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>To determine the number of <strong>d electrons<\/strong> in the iron ion of the complex K\u2083[Fe(CN)\u2086], follow these steps:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Identify the oxidation state of the metal (Fe)<\/strong>: The complex is <strong>K\u2083[Fe(CN)\u2086]<\/strong>, which means it has three K\u207a ions and one [Fe(CN)\u2086]\u00b3\u207b ion. The cyanide ions (CN\u207b) are generally considered as ligands with a charge of -1 each. Since there are six CN\u207b ions, their total negative charge is -6. The overall charge of the complex is -3 (due to the 3 K\u207a ions), and thus, the charge on the iron ion (Fe) must balance the charges from the cyanides. Therefore, the iron ion must have a <strong>+3<\/strong> charge, i.e., <strong>Fe\u00b3\u207a<\/strong>.<\/li>\n\n\n\n<li><strong>Determine the electron configuration of Fe\u00b3\u207a<\/strong>: Iron (Fe) has an atomic number of 26, so its ground-state electron configuration is <strong>[Ar] 3d\u2076 4s\u00b2<\/strong>. When Fe loses three electrons to form Fe\u00b3\u207a, the electrons are removed first from the 4s orbital and then from the 3d orbitals. This results in the electron configuration for Fe\u00b3\u207a being <strong>[Ar] 3d\u2075<\/strong>.<\/li>\n\n\n\n<li><strong>Count the d electrons<\/strong>: In the Fe\u00b3\u207a ion, the 3d orbitals contain <strong>5 electrons<\/strong>.<\/li>\n<\/ol>\n\n\n\n<p>Therefore, the number of <strong>d electrons<\/strong> in the iron ion of K\u2083[Fe(CN)\u2086] is <strong>5<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>How many electrons are in the iron ion of K3[Fe(CN)6]? A) 3 B) 5 C) 6 D) 7 E) 4 The correct answer and explanation is: The correct answer is B) 5. Explanation: To determine the number of d electrons in the iron ion of the complex K\u2083[Fe(CN)\u2086], follow these steps: Therefore, 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-254253","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/254253","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=254253"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/254253\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=254253"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=254253"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=254253"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}