{"id":185248,"date":"2025-01-22T09:37:11","date_gmt":"2025-01-22T09:37:11","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=185248"},"modified":"2025-01-22T09:37:13","modified_gmt":"2025-01-22T09:37:13","slug":"determine-the-number-of-valence-electrons-in","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/01\/22\/determine-the-number-of-valence-electrons-in\/","title":{"rendered":"Determine the number of valence electrons in"},"content":{"rendered":"\n

Q1. Determine the number of valence electrons in: SNF and SbF 5 2 (Multiple choice) SNF = A.18; B. 32; C. 12; SbF 5 2- =A. 98; B. 42; C. 40; Q2. Determine the AXmEn notation of each in TeCl 5 – and ICl 2 + (Multiple choice) TeCl 5 – = A. AX6; B. AX5; C. AX5E; D. AX5E2; ICl 2 + =A. AX2E2; B. AX2E; C. AX2; D. AX4;<\/p>\n\n\n\n

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

Q1. Determining the number of valence electrons<\/strong><\/h3>\n\n\n\n

For SNF:<\/strong><\/h4>\n\n\n\n
    \n
  • S<\/strong> (Sulfur) has 6 valence electrons.<\/li>\n\n\n\n
  • N<\/strong> (Nitrogen) has 5 valence electrons.<\/li>\n\n\n\n
  • F<\/strong> (Fluorine) has 7 valence electrons.<\/li>\n<\/ul>\n\n\n\n

    The total valence electrons for SNF are:
    [
    6 + 5 + 7 = 18 \\, \\text{electrons}.
    ]<\/p>\n\n\n\n

    Correct answer: A. 18<\/strong><\/p>\n\n\n\n

    For SbF\u2085\u00b2\u207b:<\/strong><\/h4>\n\n\n\n
      \n
    • Sb<\/strong> (Antimony) has 5 valence electrons.<\/li>\n\n\n\n
    • Each of the 5 F<\/strong> atoms contributes 7 valence electrons: ( 5 \\times 7 = 35 ).<\/li>\n\n\n\n
    • The extra 2\u207b charge<\/strong> adds 2 electrons.<\/li>\n<\/ul>\n\n\n\n

      The total valence electrons for SbF\u2085\u00b2\u207b are:
      [
      5 + 35 + 2 = 42 \\, \\text{electrons}.
      ]<\/p>\n\n\n\n

      Correct answer: B. 42<\/strong><\/p>\n\n\n\n

      \n\n\n\n

      Q2. Determining AXmEn notation<\/strong><\/h3>\n\n\n\n

      For TeCl\u2085\u207b:<\/strong><\/h4>\n\n\n\n
        \n
      • Te<\/strong> (Tellurium) is the central atom with 6 valence electrons.<\/li>\n\n\n\n
      • 5 Cl<\/strong> atoms are bonded to Te, each contributing 1 bond.<\/li>\n\n\n\n
      • The negative charge (-1)<\/strong> adds 1 valence electron.<\/li>\n\n\n\n
      • Total valence electrons around Te = ( 6 + 5 + 1 = 12 ) electrons (6 electron pairs).<\/li>\n\n\n\n
      • 5 pairs are bonding (AX\u2085), and 1 is a lone pair (E\u2081).<\/strong><\/li>\n<\/ul>\n\n\n\n

        Correct AXmEn notation: C. AX\u2085E<\/strong><\/p>\n\n\n\n

        For ICl\u2082\u207a:<\/strong><\/h4>\n\n\n\n
          \n
        • I<\/strong> (Iodine) is the central atom with 7 valence electrons.<\/li>\n\n\n\n
        • 2 Cl<\/strong> atoms are bonded to I, each contributing 1 bond.<\/li>\n\n\n\n
        • The positive charge (+1)<\/strong> removes 1 electron.<\/li>\n\n\n\n
        • Total valence electrons around I = ( 7 + 2 – 1 = 8 ) electrons (4 electron pairs).<\/li>\n\n\n\n
        • 2 pairs are bonding (AX\u2082), and 2 are lone pairs (E\u2082).<\/strong><\/li>\n<\/ul>\n\n\n\n

          Correct AXmEn notation: A. AX\u2082E\u2082<\/strong><\/p>\n\n\n\n

          \n\n\n\n

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

          Valence electron counting and AXmEn notation rely on understanding the central atom’s electron distribution. The total number of electrons is calculated by summing the central atom\u2019s valence electrons, contributions from bonded atoms, and charges. AXmEn is then derived by identifying bonding pairs (AX\u2098) and lone pairs (E\u2099) on the central atom. Correct identification ensures accurate molecular geometry predictions.<\/p>\n","protected":false},"excerpt":{"rendered":"

          Q1. Determine the number of valence electrons in: SNF and SbF 5 2 (Multiple choice) SNF = A.18; B. 32; C. 12; SbF 5 2- =A. 98; B. 42; C. 40; Q2. Determine the AXmEn notation of each in TeCl 5 – and ICl 2 + (Multiple choice) TeCl 5 – = A. AX6; B. […]<\/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-185248","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/185248","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=185248"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/185248\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=185248"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=185248"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=185248"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}