{"id":245604,"date":"2025-07-06T09:45:55","date_gmt":"2025-07-06T09:45:55","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=245604"},"modified":"2025-07-06T09:45:57","modified_gmt":"2025-07-06T09:45:57","slug":"fix-any-errors-in-these-proposed-electron-configurations-3","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/06\/fix-any-errors-in-these-proposed-electron-configurations-3\/","title":{"rendered":"Fix any errors in these proposed electron configurations.\u00a0"},"content":{"rendered":"\n
\"\"<\/figure>\n\n\n\n

The Correct Answer and Explanation is:<\/strong>1<\/a><\/sup><\/p>\n\n\n\n\n\n

Let’s go over the proposed electron configurations for the atoms with 28, 20, and 18 electrons.<\/p>\n\n\n\n

    \n
  1. 28 Electrons<\/strong>:
    The electron configuration provided is:
    1s\u00b2 2s\u00b2 2p\u2076 3s\u00b2 3p\u2076 3d\u00b9\u2070<\/code>.
    However, this configuration is incorrect<\/strong>. The total electron count is only 26, as the 3d subshell should contain 10 electrons (correct), but the 4s subshell is missing.
    The correct configuration<\/strong> should be:
    1s\u00b2 2s\u00b2 2p\u2076 3s\u00b2 3p\u2076 3d\u00b9\u2070 4s\u00b2<\/code>.
    This configuration represents the atom of Nickel (Ni)<\/strong>, with 28 electrons in total.<\/li>\n\n\n\n
  2. 20 Electrons<\/strong>:
    The configuration provided is:
    1s\u00b2 2s\u00b2 2p\u2076 2d\u2078 3s\u00b2 3p\u00b2<\/code>.
    This is incorrect<\/strong> because the 2d subshell does not exist. The valid subshells are 2s, 2p, 3s, 3p, etc., and there is no 2d orbital. The correct configuration should fill the available subshells properly, and the 3d subshell comes after the 4s subshell.
    The correct configuration<\/strong> for an atom with 20 electrons (such as Calcium (Ca)<\/strong>) is:
    1s\u00b2 2s\u00b2 2p\u2076 3s\u00b2 3p\u2076 4s\u00b2<\/code>.<\/li>\n\n\n\n
  3. 18 Electrons<\/strong>:
    The configuration provided is:
    1s\u00b2 2s\u00b2 2p\u2076 3s\u00b2 3p\u2076<\/code>.
    This configuration is correct<\/strong> for an atom with 18 electrons, which corresponds to the element Argon (Ar)<\/strong>. Argon is a noble gas, and its electron configuration fills all lower subshells to their maximum capacity without further electron placement in the higher energy levels.<\/li>\n<\/ol>\n\n\n\n

    Summary of Corrected Configurations:<\/h3>\n\n\n\n
      \n
    • 28 electrons<\/strong>: 1s\u00b2 2s\u00b2 2p\u2076 3s\u00b2 3p\u2076 3d\u00b9\u2070 4s\u00b2<\/code><\/li>\n\n\n\n
    • 20 electrons<\/strong>: 1s\u00b2 2s\u00b2 2p\u2076 3s\u00b2 3p\u2076 4s\u00b2<\/code><\/li>\n\n\n\n
    • 18 electrons<\/strong>: 1s\u00b2 2s\u00b2 2p\u2076 3s\u00b2 3p\u2076<\/code><\/li>\n<\/ul>\n\n\n\n

      These corrections align with the correct subshells and the filling order of orbitals.<\/p>\n\n\n\n

      \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

      The Correct Answer and Explanation is:1 Let’s go over the proposed electron configurations for the atoms with 28, 20, and 18 electrons. Summary of Corrected Configurations: These corrections align with the correct subshells and the filling order of orbitals.<\/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-245604","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/245604","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=245604"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/245604\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=245604"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=245604"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=245604"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}