{"id":31554,"date":"2025-06-22T04:02:25","date_gmt":"2025-06-22T04:02:25","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=31554"},"modified":"2025-06-22T04:02:27","modified_gmt":"2025-06-22T04:02:27","slug":"how-many-lone-pairs-of-electrons-are-found-on-the-central-atom-of-hcn","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/how-many-lone-pairs-of-electrons-are-found-on-the-central-atom-of-hcn\/","title":{"rendered":"How many lone pairs of electrons are found on the central atom of HCN"},"content":{"rendered":"\n<p>How many lone pairs of electrons are found on the central atom of HCN?<\/p>\n\n\n\n<p><strong>The Correct Answer and Explanation is:<\/strong><\/p>\n\n\n\n<p><strong>Correct Answer:<\/strong><br><strong>Zero (0) lone pairs<\/strong> of electrons are found on the central atom of HCN.<\/p>\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>HCN (hydrogen cyanide) is a linear molecule with the chemical formula H\u2013C\u2261N. To determine the number of lone pairs on the central atom, we must first understand the Lewis structure and the electron configuration.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Identify the atoms involved:<\/strong>\n<ul class=\"wp-block-list\">\n<li>H (hydrogen)<\/li>\n\n\n\n<li>C (carbon)<\/li>\n\n\n\n<li>N (nitrogen)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Determine the central atom:<\/strong><br>Carbon is the central atom because it can form four bonds and is more capable of acting as a bridge between hydrogen and nitrogen.<\/li>\n\n\n\n<li><strong>Count total valence electrons:<\/strong>\n<ul class=\"wp-block-list\">\n<li>Hydrogen contributes 1 valence electron.<\/li>\n\n\n\n<li>Carbon contributes 4 valence electrons.<\/li>\n\n\n\n<li>Nitrogen contributes 5 valence electrons.<br><strong>Total = 1 + 4 + 5 = 10 valence electrons<\/strong><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Construct the basic skeleton:<\/strong><br>Arrange atoms as H\u2013C\u2013N.<\/li>\n\n\n\n<li><strong>Distribute electrons to satisfy the octet rule:<\/strong>\n<ul class=\"wp-block-list\">\n<li>Hydrogen forms a single bond with carbon.<\/li>\n\n\n\n<li>Carbon forms a <strong>triple bond<\/strong> with nitrogen to fulfill the octet for both atoms.<\/li>\n\n\n\n<li>The triple bond accounts for 6 electrons between carbon and nitrogen.<\/li>\n\n\n\n<li>One single bond connects hydrogen to carbon (2 electrons).<\/li>\n\n\n\n<li>This uses 8 electrons in bonds.<\/li>\n\n\n\n<li>The remaining 2 electrons go as a lone pair on nitrogen.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Check the central atom (carbon):<\/strong>\n<ul class=\"wp-block-list\">\n<li>Carbon is involved in four bonds (1 single bond with H and 3 with N).<\/li>\n\n\n\n<li>It uses all 4 of its valence electrons in bonding.<\/li>\n\n\n\n<li>Therefore, carbon has <strong>no lone pairs<\/strong>.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Conclusion:<\/strong><br>The central atom (carbon) in HCN has <strong>zero lone pairs<\/strong>. All its valence electrons are involved in bonding, creating a linear geometry with no unshared pairs around carbon.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner5-174.jpeg\" alt=\"\" class=\"wp-image-31555\" srcset=\"https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner5-174.jpeg 1024w, https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner5-174-300x300.jpeg 300w, https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner5-174-150x150.jpeg 150w, https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner5-174-768x768.jpeg 768w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>How many lone pairs of electrons are found on the central atom of HCN? The Correct Answer and Explanation is: Correct Answer:Zero (0) lone pairs of electrons are found on the central atom of HCN. Explanation: HCN (hydrogen cyanide) is a linear molecule with the chemical formula H\u2013C\u2261N. To determine the number of lone pairs [&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-31554","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/31554","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=31554"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/31554\/revisions"}],"predecessor-version":[{"id":31556,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/31554\/revisions\/31556"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=31554"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=31554"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=31554"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}