{"id":184403,"date":"2025-01-20T20:18:36","date_gmt":"2025-01-20T20:18:36","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=184403"},"modified":"2025-01-20T20:18:38","modified_gmt":"2025-01-20T20:18:38","slug":"how-many-valence-shell-electrons-does-an-atom-of-thallium-have","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/01\/20\/how-many-valence-shell-electrons-does-an-atom-of-thallium-have\/","title":{"rendered":"How many valence shell electrons does an atom of thallium have"},"content":{"rendered":"\n

How many valence shell electrons does an atom of thallium have?<\/p>\n\n\n\n

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

Thallium (( \\text{Tl} )) has three valence electrons<\/strong> in its outermost shell.<\/p>\n\n\n\n

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

Thallium is an element in Group 13 of the periodic table, also known as the boron group. The electron configuration of thallium is:<\/p>\n\n\n\n

[ \\text{Tl}: [\\text{Xe}] 4f^{14} 5d^{10} 6s^2 6p^1 ]<\/p>\n\n\n\n

To determine the number of valence electrons, we focus on the outermost electron shell, which in thallium’s case is the sixth shell ((n=6)). The electrons in the (6s) and (6p) orbitals are part of this shell:<\/p>\n\n\n\n

    \n
  • (6s^2): two electrons<\/li>\n\n\n\n
  • (6p^1): one electron<\/li>\n<\/ul>\n\n\n\n

    Adding these together gives a total of three valence electrons<\/strong>.<\/p>\n\n\n\n

    Key Points:<\/h3>\n\n\n\n
      \n
    1. Valence electrons<\/strong> are the electrons in the outermost electron shell of an atom. These are the electrons involved in chemical bonding.<\/li>\n\n\n\n
    2. Thallium belongs to Group 13, where all elements typically have three valence electrons. This group trend is due to the presence of two (s)-electrons and one (p)-electron in their outermost shell.<\/li>\n\n\n\n
    3. Although thallium has filled (4f)- and (5d)-subshells, these electrons are not considered valence electrons because they reside in inner shells and do not participate directly in chemical bonding.<\/li>\n\n\n\n
    4. Thallium’s chemistry is interesting because it can exhibit multiple oxidation states. The +1 oxidation state is more common than the expected +3, due to the “inert pair effect.” This effect arises because the (6s^2) electrons are more stable and less likely to participate in bonding, leaving the (6p^1) electron to bond.<\/li>\n<\/ol>\n\n\n\n

      Thus, while thallium has three valence electrons, its chemical behavior often reflects the involvement of only one electron from its (6p)-subshell.<\/p>\n","protected":false},"excerpt":{"rendered":"

      How many valence shell electrons does an atom of thallium have? The Correct Answer and Explanation is : Thallium (( \\text{Tl} )) has three valence electrons in its outermost shell. Explanation: Thallium is an element in Group 13 of the periodic table, also known as the boron group. The electron configuration of thallium is: [ […]<\/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-184403","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/184403","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=184403"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/184403\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=184403"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=184403"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=184403"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}