{"id":249822,"date":"2025-07-10T05:31:10","date_gmt":"2025-07-10T05:31:10","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=249822"},"modified":"2025-07-10T05:31:12","modified_gmt":"2025-07-10T05:31:12","slug":"which-of-the-following-best-represents-the-lewis-dot-structure-for-helium-he-atomic-number","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/10\/which-of-the-following-best-represents-the-lewis-dot-structure-for-helium-he-atomic-number\/","title":{"rendered":"Which of the following best represents the Lewis dot structure for helium (He, atomic number"},"content":{"rendered":"\n<pre id=\"preorder-ask-header-text\" class=\"wp-block-preformatted\">Which of the following best represents the Lewis dot structure for helium (He, atomic number 2). * X X X X X X X X X A B C D E F G H I O A O B O C O D O E O F O G O H O I 1. How many total electrons are found in potassium (K, atomic number 19)? 1 point Your answer<\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/07\/image-357.png\" alt=\"\" class=\"wp-image-249823\"\/><\/figure>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>The Lewis dot structure for helium (He) shows the element&#8217;s valence electrons, which are represented as dots around the symbol. Helium, with atomic number 2, has two valence electrons. Since it is a noble gas, it has a stable electron configuration with its 2 electrons filling its 1s orbital.<\/p>\n\n\n\n<p>Looking at the options in the image, the correct representation of helium&#8217;s Lewis dot structure is:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Option B<\/strong>: Two dots around the He symbol.<\/li>\n<\/ul>\n\n\n\n<p>Helium&#8217;s electron configuration is 1s\u00b2, meaning both valence electrons are paired in the 1s orbital. Therefore, the dots would be placed side by side to reflect this pairing.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Potassium (K) Electrons:<\/h3>\n\n\n\n<p>Potassium (K) has an atomic number of 19, meaning it has 19 total electrons. Potassium is in the 4th period of the periodic table, and its electron configuration is [Ar] 4s\u00b9. This shows that after the argon core (18 electrons), potassium has 1 additional electron in the 4s orbital. Therefore, potassium has a total of 19 electrons.<\/p>\n\n\n\n<p>Thus, the correct answer to how many electrons are in potassium is <strong>19<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/07\/learnexams-banner6-60.jpeg\" alt=\"\" class=\"wp-image-249824\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Which of the following best represents the Lewis dot structure for helium (He, atomic number 2). * X X X X X X X X X A B C D E F G H I O A O B O C O D O E O F O G O H O I 1. How [&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-249822","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/249822","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=249822"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/249822\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=249822"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=249822"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=249822"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}