{"id":236704,"date":"2025-06-16T12:34:46","date_gmt":"2025-06-16T12:34:46","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=236704"},"modified":"2025-06-16T12:34:48","modified_gmt":"2025-06-16T12:34:48","slug":"in-which-sublevels-the-valence-electrons-are-located-for-the-following-atoms","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/16\/in-which-sublevels-the-valence-electrons-are-located-for-the-following-atoms\/","title":{"rendered":"In which sublevels the valence electrons are located for the following atoms"},"content":{"rendered":"\n<p> In which sublevels the valence electrons are located for the following atoms? Sr: Te: 2) What is the number f unpaired electrons found in the following atoms? Ni: Ca: 3) Label the following atoms as paramagnetic or diamagnetic; a) NI b) Se c) C<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-0-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p><strong>Correct Answers:<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>1) Sublevels of valence electrons:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Sr (Strontium):<\/strong> 5s<\/li>\n\n\n\n<li><strong>Te (Tellurium):<\/strong> 5s and 5p<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>2) Number of unpaired electrons:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Ni (Nickel):<\/strong> 2 unpaired electrons<\/li>\n\n\n\n<li><strong>Ca (Calcium):<\/strong> 0 unpaired electrons<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>3) Paramagnetic or Diamagnetic:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>a) Ni:<\/strong> Paramagnetic<\/li>\n\n\n\n<li><strong>b) Se:<\/strong> Diamagnetic<\/li>\n\n\n\n<li><strong>c) C:<\/strong> Paramagnetic<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p><strong>Explanation:<\/strong><\/p>\n\n\n\n<p>To understand where valence electrons are located, one must write the electron configuration of the atoms. Strontium (Sr) has an atomic number of 38. Its electron configuration is:<br><strong>1s\u00b2 2s\u00b2 2p\u2076 3s\u00b2 3p\u2076 4s\u00b2 3d\u00b9\u2070 4p\u2076 5s\u00b2<\/strong><br>The outermost electrons are in the <strong>5s<\/strong> sublevel. Hence, Sr has its valence electrons in the 5s sublevel.<\/p>\n\n\n\n<p>Tellurium (Te) has an atomic number of 52. Its electron configuration is:<br><strong>[Kr] 5s\u00b2 4d\u00b9\u2070 5p\u2074<\/strong><br>Its valence electrons are in both the <strong>5s<\/strong> and <strong>5p<\/strong> sublevels.<\/p>\n\n\n\n<p>To determine the number of unpaired electrons, examine the orbital diagram based on Hund\u2019s rule and the Aufbau principle. Nickel (Ni) has an atomic number of 28, and its electron configuration is:<br><strong>[Ar] 4s\u00b2 3d\u2078<\/strong><br>In the 3d sublevel, 8 electrons fill five orbitals, with two of them remaining unpaired.<\/p>\n\n\n\n<p>Calcium (Ca), atomic number 20, has the configuration:<br><strong>[Ar] 4s\u00b2<\/strong><br>Both electrons in the 4s orbital are paired. Therefore, calcium has <strong>0 unpaired electrons<\/strong>.<\/p>\n\n\n\n<p>An atom is <strong>paramagnetic<\/strong> if it has at least one unpaired electron, and <strong>diamagnetic<\/strong> if all electrons are paired.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nickel, with two unpaired electrons in 3d, is <strong>paramagnetic<\/strong>.<\/li>\n\n\n\n<li>Selenium (Se), atomic number 34, has a configuration ending in <strong>4p\u2074<\/strong>. All electrons are paired in its orbitals, making it <strong>diamagnetic<\/strong>.<\/li>\n\n\n\n<li>Carbon (C), atomic number 6, ends in <strong>2p\u00b2<\/strong>, with two unpaired electrons, making it <strong>paramagnetic<\/strong>.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-711.jpeg\" alt=\"\" class=\"wp-image-236705\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>In which sublevels the valence electrons are located for the following atoms? Sr: Te: 2) What is the number f unpaired electrons found in the following atoms? Ni: Ca: 3) Label the following atoms as paramagnetic or diamagnetic; a) NI b) Se c) C The Correct Answer and Explanation is: Correct Answers: 1) Sublevels of [&hellip;]<\/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-236704","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/236704","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=236704"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/236704\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=236704"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=236704"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=236704"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}