{"id":208795,"date":"2025-04-28T06:23:27","date_gmt":"2025-04-28T06:23:27","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=208795"},"modified":"2025-04-28T06:23:29","modified_gmt":"2025-04-28T06:23:29","slug":"which-one-of-the-following-elements-has-a-ground-state-electronic-configuration-of-ar-4s2-3d10-4p3","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/04\/28\/which-one-of-the-following-elements-has-a-ground-state-electronic-configuration-of-ar-4s2-3d10-4p3\/","title":{"rendered":"Which one of the following elements has a ground state electronic configuration of [Ar] 4s2 3d10 4p3"},"content":{"rendered":"\n

Which one of the following elements has a ground state electronic configuration of [Ar] 4s2 3d10 4p3? <\/p>\n\n\n\n

A) Se <\/p>\n\n\n\n

B) Cr <\/p>\n\n\n\n

C) Br <\/p>\n\n\n\n

D) Ga<\/p>\n\n\n\n

The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n

The correct answer is A) Se (Selenium)<\/strong>.<\/p>\n\n\n\n

Explanation:<\/h3>\n\n\n\n

To determine the element with the given ground state electronic configuration of [Ar] 4s\u00b2 3d\u00b9\u2070 4p\u00b3<\/strong>, let’s break down the electron configuration and match it with the periodic table.<\/p>\n\n\n\n

1. Understanding the Notation<\/strong>:<\/h4>\n\n\n\n
    \n
  • [Ar]<\/strong> refers to the electron configuration of argon, which is a noble gas with the atomic number 18. Therefore, the configuration starts with argon\u2019s electrons and proceeds from there.<\/li>\n\n\n\n
  • The configuration 4s\u00b2 3d\u00b9\u2070 4p\u00b3<\/strong> describes additional electrons after argon:<\/li>\n\n\n\n
  • 4s\u00b2<\/strong> indicates two electrons in the 4s orbital.<\/li>\n\n\n\n
  • 3d\u00b9\u2070<\/strong> indicates ten electrons in the 3d orbital.<\/li>\n\n\n\n
  • 4p\u00b3<\/strong> indicates three electrons in the 4p orbital.<\/li>\n<\/ul>\n\n\n\n

    2. Total Number of Electrons<\/strong>:<\/h4>\n\n\n\n
      \n
    • Argon (Ar) has 18 electrons, so starting from Ar, we add the electrons from the 4s\u00b2, 3d\u00b9\u2070, and 4p\u00b3 orbitals:<\/li>\n\n\n\n
    • 18 (from Ar) + 2 (from 4s\u00b2) + 10 (from 3d\u00b9\u2070) + 3 (from 4p\u00b3) = 33 electrons<\/strong>.<\/li>\n\n\n\n
    • An element with 33 electrons is Selenium (Se)<\/strong>, which has an atomic number of 34. Therefore, its full electron configuration is: [Ar] 4s\u00b2 3d\u00b9\u2070 4p\u00b3<\/strong>.<\/li>\n<\/ul>\n\n\n\n

      3. Periodic Table Position<\/strong>:<\/h4>\n\n\n\n
        \n
      • Selenium (Se) is located in group 16 of the periodic table, which is known as the chalcogens. The electronic configuration of Se confirms it is in this group because it ends with 4p\u00b3, where it has three electrons in the p-block.<\/li>\n<\/ul>\n\n\n\n

        4. Why Other Options Are Incorrect<\/strong>:<\/h4>\n\n\n\n
          \n
        • B) Cr (Chromium)<\/strong> has an electron configuration of [Ar] 4s\u00b9 3d\u2075<\/strong>, which is different from the given configuration.<\/li>\n\n\n\n
        • C) Br (Bromine)<\/strong> has an electron configuration of [Ar] 4s\u00b2 3d\u00b9\u2070 4p\u2075<\/strong>, which shows 5 electrons in the 4p orbital, not 3.<\/li>\n\n\n\n
        • D) Ga (Gallium)<\/strong> has an electron configuration of [Ar] 4s\u00b2 3d\u00b9\u2070 4p\u00b9<\/strong>, which ends with a 4p\u00b9 configuration, not 4p\u00b3.<\/li>\n<\/ul>\n\n\n\n

          Thus, the element that has the ground state electron configuration [Ar] 4s\u00b2 3d\u00b9\u2070 4p\u00b3<\/strong> is Selenium (Se)<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"

          Which one of the following elements has a ground state electronic configuration of [Ar] 4s2 3d10 4p3? A) Se B) Cr C) Br D) Ga The correct answer and explanation is : The correct answer is A) Se (Selenium). Explanation: To determine the element with the given ground state electronic configuration of [Ar] 4s\u00b2 3d\u00b9\u2070 […]<\/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-208795","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/208795","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=208795"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/208795\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=208795"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=208795"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=208795"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}