{"id":248025,"date":"2025-07-08T05:37:32","date_gmt":"2025-07-08T05:37:32","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=248025"},"modified":"2025-07-08T05:37:34","modified_gmt":"2025-07-08T05:37:34","slug":"is-a-molecule-with-a-central-atom-that-has-three-electron-groups-and-three-bonded-atoms-assume-a-trigonal-pyramidal-shape","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/08\/is-a-molecule-with-a-central-atom-that-has-three-electron-groups-and-three-bonded-atoms-assume-a-trigonal-pyramidal-shape\/","title":{"rendered":"Is a molecule with a central atom that has three electron groups and three bonded atoms assume a trigonal pyramidal shape"},"content":{"rendered":"\n

Is a molecule with a central atom that has three electron groups and three bonded atoms assume a trigonal pyramidal shape<\/p>\n\n\n\n

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

No, a molecule with a central atom that has three electron groups and three bonded atoms does not assume a trigonal pyramidal shape. Instead, it adopts a trigonal planar<\/strong> shape.<\/p>\n\n\n\n

Here’s why:<\/p>\n\n\n\n

    \n
  1. Electron Groups and Bonding<\/strong>: When a molecule has three electron groups (bonding pairs or lone pairs) around the central atom, and all three are bonded atoms, these groups arrange themselves in a way that minimizes electron-electron repulsion. According to VSEPR theory (Valence Shell Electron Pair Repulsion), three electron groups will spread out in a flat, trigonal planar geometry<\/strong>, where the bond angles between the atoms are 120\u00b0.<\/li>\n\n\n\n
  2. Trigonal Pyramidal vs Trigonal Planar<\/strong>: The trigonal pyramidal shape is observed when there are three bonded atoms but one lone pair<\/strong> of electrons on the central atom. The lone pair repels the bonding pairs, causing the molecule to adopt a pyramid-like shape with the central atom at the apex. In contrast, trigonal planar geometry is flat, with no lone pairs affecting the arrangement.<\/li>\n\n\n\n
  3. Example<\/strong>: A classic example of a trigonal planar molecule is BF\u2083<\/strong> (boron trifluoride), where the boron atom has three bonded fluorine atoms and no lone pairs. If there were a lone pair, as in NH\u2083<\/strong> (ammonia), the shape would be trigonal pyramidal because of the lone pair pushing down on the bonding pairs.<\/li>\n<\/ol>\n\n\n\n

    In summary, for a molecule with three electron groups and three bonded atoms (no lone pairs), the geometry is trigonal planar, not trigonal pyramidal. The presence of lone pairs is essential for a trigonal pyramidal structure.<\/p>\n\n\n\n

    \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

    Is a molecule with a central atom that has three electron groups and three bonded atoms assume a trigonal pyramidal shape The Correct Answer and Explanation is: No, a molecule with a central atom that has three electron groups and three bonded atoms does not assume a trigonal pyramidal shape. Instead, it adopts a trigonal […]<\/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-248025","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/248025","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=248025"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/248025\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=248025"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=248025"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=248025"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}