{"id":185381,"date":"2025-01-22T13:16:00","date_gmt":"2025-01-22T13:16:00","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=185381"},"modified":"2025-01-22T13:16:02","modified_gmt":"2025-01-22T13:16:02","slug":"what-is-the-electron-configuration-of-the-element-in-the-4th-period-of-group-5a-iupac-group-15","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/01\/22\/what-is-the-electron-configuration-of-the-element-in-the-4th-period-of-group-5a-iupac-group-15\/","title":{"rendered":"What is the electron configuration of the element in the 4th period of Group 5A (IUPAC Group 15)"},"content":{"rendered":"\n

What is the electron configuration of the element in the 4th period of Group 5A (IUPAC Group 15), using an appropriate noble gas symbol for the core electrons?<\/p>\n\n\n\n

(A) [Kr] 4s2 3d10 4p5<\/p>\n\n\n\n

(B) [Ar] 4s2 3d10 4p3 <\/p>\n\n\n\n

(C) [Ar] 4s2 4p3<\/p>\n\n\n\n

(D) [Kr] 4s2 4p5<\/p>\n\n\n\n

The Correct Answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n

Correct Answer: (B) [Ar] 4s\u00b2 3d\u00b9\u2070 4p\u00b3<\/strong><\/h3>\n\n\n\n

Explanation:<\/h4>\n\n\n\n

To determine the electron configuration of the element in the 4th period of Group 5A (IUPAC Group 15), follow these steps:<\/p>\n\n\n\n

\n\n\n\n

1. Identify the element:<\/strong><\/h3>\n\n\n\n
    \n
  • Group 5A (Group 15)<\/strong>: This group includes elements with 5 valence electrons in the outermost shell.<\/li>\n\n\n\n
  • 4th Period<\/strong>: The 4th period includes elements where the principal quantum number ( n = 4 ).<\/li>\n\n\n\n
  • The element in Group 15 and the 4th period is arsenic (As)<\/strong>.<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n

    2. Understand its electron configuration:<\/strong><\/h3>\n\n\n\n
      \n
    • The electron configuration is built by filling orbitals in order of increasing energy:<\/li>\n\n\n\n
    • ( 1s ), ( 2s ), ( 2p ), ( 3s ), ( 3p ), ( 4s ), ( 3d ), ( 4p ).<\/li>\n\n\n\n
    • Using the noble gas shorthand notation:<\/li>\n\n\n\n
    • Core electrons are represented by the electron configuration of the preceding noble gas (argon, ( [Ar] ), in this case).<\/li>\n\n\n\n
    • Electrons beyond ( [Ar] ) are added to the ( 4s ), ( 3d ), and ( 4p ) orbitals.<\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n

      3. Determine the configuration:<\/strong><\/h3>\n\n\n\n
        \n
      • After ( [Ar] ), the ( 4s ) orbital is filled with 2 electrons:
        [ [Ar] 4s^2 ]<\/li>\n\n\n\n
      • Next, the ( 3d ) orbital is filled with 10 electrons:
        [ [Ar] 4s^2 3d^{10} ]<\/li>\n\n\n\n
      • Finally, the ( 4p ) orbital gains 3 electrons to account for Group 15’s 5 valence electrons:
        [ [Ar] 4s^2 3d^{10} 4p^3 ]<\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n

        4. Eliminate incorrect options:<\/strong><\/h3>\n\n\n\n
          \n
        • (A) ( [Kr] ): Incorrect because the core noble gas should be ( [Ar] ) for the 4th period.<\/li>\n\n\n\n
        • (C) ( [Ar] 4s^2 4p^3 ): Incorrect because it ignores the ( 3d ) orbital.<\/li>\n\n\n\n
        • (D) ( [Kr] 4s^2 4p^5 ): Incorrect noble gas and wrong electron count.<\/li>\n<\/ul>\n\n\n\n

          Thus, the correct configuration is ( [Ar] 4s^2 3d^{10} 4p^3 ), corresponding to (B)<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"

          What is the electron configuration of the element in the 4th period of Group 5A (IUPAC Group 15), using an appropriate noble gas symbol for the core electrons? (A) [Kr] 4s2 3d10 4p5 (B) [Ar] 4s2 3d10 4p3 (C) [Ar] 4s2 4p3 (D) [Kr] 4s2 4p5 The Correct Answer and Explanation is : Correct Answer: […]<\/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-185381","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/185381","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=185381"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/185381\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=185381"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=185381"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=185381"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}