{"id":200126,"date":"2025-03-13T08:11:47","date_gmt":"2025-03-13T08:11:47","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=200126"},"modified":"2025-03-13T08:11:49","modified_gmt":"2025-03-13T08:11:49","slug":"identify-the-element-that-has-a-ground-state-electronic-configuration-of-kr5s24d5","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/13\/identify-the-element-that-has-a-ground-state-electronic-configuration-of-kr5s24d5\/","title":{"rendered":"Identify the element that has a ground state electronic configuration of [Kr]5s24d5"},"content":{"rendered":"\n<p>Identify the element that has a ground state electronic configuration of [Kr]5s24d5.<\/p>\n\n\n\n<p>Tc<br>Mn<br>Nb<br>Ru<\/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 element with the ground-state electronic configuration [Kr]5s\u00b24d\u2075 is <strong>Ruthenium (Ru)<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>The notation &#8220;[Kr]&#8221; refers to the electron configuration of Krypton, which corresponds to the noble gas element with atomic number 36. Therefore, the configuration &#8220;[Kr]&#8221; accounts for the first 36 electrons, leaving the remaining electrons to be placed in higher-energy orbitals.<\/p>\n\n\n\n<p>Now, let&#8217;s break down the rest of the configuration:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>5s\u00b2<\/strong>: This means that two electrons occupy the 5s orbital, which is the first available orbital in the fifth energy level.<\/li>\n\n\n\n<li><strong>4d\u2075<\/strong>: This indicates that five electrons occupy the 4d orbital, which is the next available orbital in the fourth energy level.<\/li>\n<\/ul>\n\n\n\n<p>To find the element, we count the total number of electrons:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Krypton (Kr) contributes 36 electrons.<\/li>\n\n\n\n<li>The 5s\u00b2 contributes 2 electrons.<\/li>\n\n\n\n<li>The 4d\u2075 contributes 5 electrons.<\/li>\n<\/ul>\n\n\n\n<p>This gives a total of 36 + 2 + 5 = 44 electrons, meaning the atomic number of the element is <strong>44<\/strong>.<\/p>\n\n\n\n<p>Element number 44 on the periodic table is <strong>Ruthenium (Ru)<\/strong>, which belongs to the transition metals group.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Why not the other elements?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Technetium (Tc)<\/strong> has the atomic number 43, with the electronic configuration [Kr]5s\u00b24d\u2075. This is very close to the configuration in question but has one less electron than Ruthenium, so it is not the correct answer.<\/li>\n\n\n\n<li><strong>Manganese (Mn)<\/strong> has the atomic number 25, with the configuration [Ar]4s\u00b23d\u2075. This is far different from the given configuration.<\/li>\n\n\n\n<li><strong>Niobium (Nb)<\/strong> has the atomic number 41, with the configuration [Kr]5s\u00b94d\u2074, which is also different from the configuration in question.<\/li>\n<\/ol>\n\n\n\n<p>Thus, <strong>Ruthenium (Ru)<\/strong> is the correct element with the given ground-state electronic configuration [Kr]5s\u00b24d\u2075.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Identify the element that has a ground state electronic configuration of [Kr]5s24d5. TcMnNbRu The correct answer and explanation is : The element with the ground-state electronic configuration [Kr]5s\u00b24d\u2075 is Ruthenium (Ru). Explanation: The notation &#8220;[Kr]&#8221; refers to the electron configuration of Krypton, which corresponds to the noble gas element with atomic number 36. Therefore, the [&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-200126","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/200126","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=200126"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/200126\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=200126"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=200126"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=200126"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}