{"id":213912,"date":"2025-05-13T04:40:25","date_gmt":"2025-05-13T04:40:25","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=213912"},"modified":"2025-05-13T04:40:27","modified_gmt":"2025-05-13T04:40:27","slug":"electron-configuration-of-ru3-as3-y3-pd2-and-au3","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/13\/electron-configuration-of-ru3-as3-y3-pd2-and-au3\/","title":{"rendered":"Electron configuration of ru3+, as3-, y3+ pd2+ and au3+."},"content":{"rendered":"\n

electron configuration of ru3+, as3-, y3+ pd2+ and au3+. determine which one has noble gas configuration<\/p>\n\n\n\n

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

To determine the electron configurations<\/strong> of the ions Ru\u00b3\u207a, As\u00b3\u207b, Y\u00b3\u207a, Pd\u00b2\u207a, and Au\u00b3\u207a<\/strong>, and find out which one has a noble gas configuration<\/strong>, we follow these steps:<\/p>\n\n\n\n

\n\n\n\n

1. Determine the Atomic Number (Z):<\/strong><\/h3>\n\n\n\n
    \n
  • Ru (Ruthenium): 44<\/li>\n\n\n\n
  • As (Arsenic): 33<\/li>\n\n\n\n
  • Y (Yttrium): 39<\/li>\n\n\n\n
  • Pd (Palladium): 46<\/li>\n\n\n\n
  • Au (Gold): 79<\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n

    2. Write the Ground-State Electron Configurations (Neutral Atoms):<\/strong><\/h3>\n\n\n\n
      \n
    • Ru: [Kr] 5s\u00b9 4d\u2077<\/li>\n\n\n\n
    • As: [Ar] 4s\u00b2 3d\u00b9\u2070 4p\u00b3<\/li>\n\n\n\n
    • Y: [Kr] 5s\u00b2 4d\u00b9<\/li>\n\n\n\n
    • Pd: [Kr] 4d\u00b9\u2070<\/li>\n\n\n\n
    • Au: [Xe] 6s\u00b9 4f\u00b9\u2074 5d\u00b9\u2070<\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n

      3. Determine the Ion Configurations:<\/strong><\/h3>\n\n\n\n

      \u2705 Ru\u00b3\u207a (remove 3 electrons)<\/strong><\/h4>\n\n\n\n

      From 5s and 4d:
      Ru\u00b3\u207a = [Kr] 4d\u2075<\/strong><\/p>\n\n\n\n

      \u2705 As\u00b3\u207b (add 3 electrons)<\/strong><\/h4>\n\n\n\n

      Fill 4p:
      As\u00b3\u207b = [Kr]<\/strong> (As gains 3 electrons to complete 4p\u2076)<\/p>\n\n\n\n

      \u2705 Noble gas configuration!<\/strong><\/p>\n\n\n\n

      \u2705 Y\u00b3\u207a (remove 3 electrons)<\/strong><\/h4>\n\n\n\n

      From 5s\u00b2 and 4d\u00b9:
      Y\u00b3\u207a = [Kr]<\/strong><\/p>\n\n\n\n

      \u2705 Noble gas configuration!<\/strong><\/p>\n\n\n\n

      \u2705 Pd\u00b2\u207a (remove 2 electrons)<\/strong><\/h4>\n\n\n\n

      From 4d\u00b9\u2070, assume they come from filled d orbitals (since 5s is empty in Pd):
      Pd\u00b2\u207a = [Kr] 4d\u2078<\/strong><\/p>\n\n\n\n

      \u2705 Au\u00b3\u207a (remove 3 electrons)<\/strong><\/h4>\n\n\n\n

      From 6s\u00b9 and 5d\u00b9\u2070:
      Au\u00b3\u207a = [Xe] 4f\u00b9\u2074 5d\u2078<\/strong><\/p>\n\n\n\n

      \n\n\n\n

      Conclusion: Which Have Noble Gas Configuration?<\/strong><\/h3>\n\n\n\n
        \n
      • \u2705 As\u00b3\u207b = [Kr]<\/strong> \u2014 Noble gas configuration (matches Kr)<\/em><\/li>\n\n\n\n
      • \u2705 Y\u00b3\u207a = [Kr]<\/strong> \u2014 Noble gas configuration (matches Kr)<\/em><\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n

        Explanation (300+ words):<\/strong><\/h3>\n\n\n\n

        Electron configuration describes the arrangement of electrons in an atom\u2019s orbitals. For ions, this configuration changes based on whether electrons are added (in anions) or removed (in cations).<\/p>\n\n\n\n

        Let\u2019s start with As\u00b3\u207b<\/strong>, the arsenic anion. Arsenic has 33 electrons normally, with a configuration ending in 4p\u00b3. When it gains 3 electrons, the 4p subshell becomes full (4p\u2076), matching the configuration of krypton (Kr), a noble gas. This gives As\u00b3\u207b a noble gas configuration<\/strong>, which is highly stable due to a completely filled outer shell.<\/p>\n\n\n\n

        Y\u00b3\u207a<\/strong>, yttrium’s 3+ ion, starts with 39 electrons. Losing 3 electrons removes its 5s\u00b2 and 4d\u00b9 electrons, leaving it with 36 electrons \u2014 again, the configuration of krypton ([Kr]). Hence, Y\u00b3\u207a also attains a noble gas configuration<\/strong>.<\/p>\n\n\n\n

        Ru\u00b3\u207a<\/strong>, on the other hand, loses three electrons (from 5s and 4d) but ends up with 4d\u2075 electrons beyond the krypton core, which means it does not<\/strong> match a noble gas.<\/p>\n\n\n\n

        Pd\u00b2\u207a<\/strong> loses 2 electrons, resulting in 4d\u2078 \u2014 still not a noble gas configuration. Similarly, Au\u00b3\u207a<\/strong> ends up with [Xe] 4f\u00b9\u2074 5d\u2078 \u2014 again, not a noble gas.<\/p>\n\n\n\n

        In summary, only As\u00b3\u207b and Y\u00b3\u207a<\/strong> achieve the electron configuration of a noble gas \u2014 krypton in both cases. This stability reflects the tendency of atoms and ions to achieve filled electron shells, a key principle in chemical bonding and ion formation.<\/p>\n","protected":false},"excerpt":{"rendered":"

        electron configuration of ru3+, as3-, y3+ pd2+ and au3+. determine which one has noble gas configuration The Correct Answer and Explanation is: To determine the electron configurations of the ions Ru\u00b3\u207a, As\u00b3\u207b, Y\u00b3\u207a, Pd\u00b2\u207a, and Au\u00b3\u207a, and find out which one has a noble gas configuration, we follow these steps: 1. Determine the Atomic Number […]<\/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-213912","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/213912","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=213912"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/213912\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=213912"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=213912"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=213912"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}