{"id":24920,"date":"2025-06-18T19:25:30","date_gmt":"2025-06-18T19:25:30","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=24920"},"modified":"2025-06-18T19:25:32","modified_gmt":"2025-06-18T19:25:32","slug":"provide-the-molecular-orbital-mo-diagram-for-be2","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/provide-the-molecular-orbital-mo-diagram-for-be2\/","title":{"rendered":"Provide the molecular orbital (MO) diagram for Be2"},"content":{"rendered":"\n<p>Provide the molecular orbital (MO) diagram for Be2 . b) Is this molecule paramagnetic or diamagnetic? Why? c) What is the bond order of Be2 ?<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-cyan-bluish-gray-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">) <strong>Molecular Orbital (MO) Diagram for Be\u2082:<\/strong><\/h3>\n\n\n\n<p>For beryllium (Be), the atomic number is 4, so each atom has 4 electrons. In a Be\u2082 molecule, the total number of electrons is 8.<\/p>\n\n\n\n<p>The molecular orbital configuration for molecules with atomic numbers up to 7 (including Be) follows this order:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><em>\u03c3(1s), \u03c3(1s), \u03c3(2s), \u03c3<\/em>(2s)**<\/li>\n<\/ul>\n\n\n\n<p>The 1s orbitals combine to form \u03c3(1s) and \u03c3*(1s), and the 2s orbitals combine to form \u03c3(2s) and \u03c3*(2s).<\/p>\n\n\n\n<p>So, filling the MOs with 8 electrons:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u03c3(1s)<\/strong> \u2192 2 electrons<\/li>\n\n\n\n<li><em>\u03c3(1s)<\/em>* \u2192 2 electrons<\/li>\n\n\n\n<li><strong>\u03c3(2s)<\/strong> \u2192 2 electrons<\/li>\n\n\n\n<li><em>\u03c3(2s)<\/em>* \u2192 2 electrons<\/li>\n<\/ol>\n\n\n\n<p>MO diagram summary:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">scssCopyEdit<code>\u03c3*(2s) \u2191\u2193\n\u03c3(2s)  \u2191\u2193\n\u03c3*(1s) \u2191\u2193\n\u03c3(1s)  \u2191\u2193\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">b) <strong>Is Be\u2082 Paramagnetic or Diamagnetic?<\/strong><\/h3>\n\n\n\n<p>Be\u2082 is <strong>diamagnetic<\/strong>. This is because all the electrons in the molecular orbitals are paired. There are no unpaired electrons in the configuration, so it does not have a net magnetic moment.<\/p>\n\n\n\n<p>A molecule is paramagnetic if it has at least one unpaired electron. Diamagnetism arises when all electrons are paired, causing the molecule to be repelled by a magnetic field.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">c) <strong>What Is the Bond Order of Be\u2082?<\/strong><\/h3>\n\n\n\n<p>Bond order is calculated using the formula:Bond&nbsp;Order=12\u00d7(number&nbsp;of&nbsp;bonding&nbsp;electrons\u2212number&nbsp;of&nbsp;antibonding&nbsp;electrons)\\text{Bond Order} = \\frac{1}{2} \\times (\\text{number of bonding electrons} &#8211; \\text{number of antibonding electrons})Bond&nbsp;Order=21\u200b\u00d7(number&nbsp;of&nbsp;bonding&nbsp;electrons\u2212number&nbsp;of&nbsp;antibonding&nbsp;electrons)<\/p>\n\n\n\n<p>From the MO configuration:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Bonding electrons: 2 in \u03c3(1s) + 2 in \u03c3(2s) = 4<\/li>\n\n\n\n<li>Antibonding electrons: 2 in \u03c3*(1s) + 2 in \u03c3*(2s) = 4<\/li>\n<\/ul>\n\n\n\n<p>Bond&nbsp;Order=12\u00d7(4\u22124)=0\\text{Bond Order} = \\frac{1}{2} \\times (4 &#8211; 4) = 0Bond&nbsp;Order=21\u200b\u00d7(4\u22124)=0<\/p>\n\n\n\n<p>So, <strong>bond order = 0<\/strong>, meaning Be\u2082 is not a stable molecule under normal conditions.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"852\" height=\"1024\" src=\"https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-29.jpeg\" alt=\"\" class=\"wp-image-24926\" srcset=\"https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-29.jpeg 852w, https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-29-250x300.jpeg 250w, https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-29-768x923.jpeg 768w\" sizes=\"auto, (max-width: 852px) 100vw, 852px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Provide the molecular orbital (MO) diagram for Be2 . b) Is this molecule paramagnetic or diamagnetic? Why? c) What is the bond order of Be2 ? The Correct Answer and Explanation is: ) Molecular Orbital (MO) Diagram for Be\u2082: For beryllium (Be), the atomic number is 4, so each atom has 4 electrons. In a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-24920","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/24920","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=24920"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/24920\/revisions"}],"predecessor-version":[{"id":24927,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/24920\/revisions\/24927"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=24920"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=24920"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=24920"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}