{"id":212114,"date":"2025-05-05T17:14:49","date_gmt":"2025-05-05T17:14:49","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=212114"},"modified":"2025-05-05T17:14:51","modified_gmt":"2025-05-05T17:14:51","slug":"the-number-of-electrons-in-an-ion-with-20-protons-and-an-ionic-charge-of-2-is","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/05\/the-number-of-electrons-in-an-ion-with-20-protons-and-an-ionic-charge-of-2-is\/","title":{"rendered":"The number of electrons in an ion with 20 protons and an ionic charge of 2+ is"},"content":{"rendered":"\n<p>The number of electrons in an ion with 20 protons and an ionic charge of 2+ is <\/p>\n\n\n\n<p>A) 24. <\/p>\n\n\n\n<p>B) 22. <\/p>\n\n\n\n<p>C) 20. <\/p>\n\n\n\n<p>D) 18. <\/p>\n\n\n\n<p>\u0411) 16<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n<p>The correct answer is <strong>B) 18<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>The number of protons in an atom or ion determines its element, and this number is equal to the atomic number of the element. In this case, the element with <strong>20 protons<\/strong> is <strong>Calcium (Ca)<\/strong>, as its atomic number is 20.<\/p>\n\n\n\n<p>Now, let&#8217;s break down how the number of electrons is affected by the ionic charge:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>In a <strong>neutral atom<\/strong>, the number of electrons equals the number of protons. So, for a neutral calcium atom (Ca), which has 20 protons, there would also be 20 electrons.<\/li>\n\n\n\n<li>When an atom becomes an <strong>ion<\/strong>, it either gains or loses electrons depending on the charge. The <strong>ionic charge<\/strong> tells us whether the atom has lost or gained electrons:<\/li>\n\n\n\n<li>A <strong>positive charge<\/strong> (cation) means the atom has lost electrons.<\/li>\n\n\n\n<li>A <strong>negative charge<\/strong> (anion) means the atom has gained electrons.<\/li>\n<\/ul>\n\n\n\n<p>In this case, the ion has a <strong>2+ charge<\/strong>. This means the atom has <strong>lost 2 electrons<\/strong>. To calculate the number of electrons in this ion:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Start with the neutral atom&#8217;s electron count (20 electrons for neutral calcium).<\/li>\n\n\n\n<li>Subtract the number of electrons lost due to the 2+ charge:<br>20 electrons \u2212 2 electrons = <strong>18 electrons<\/strong>.<\/li>\n<\/ol>\n\n\n\n<p>Thus, the ion has <strong>18 electrons<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Summary:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The element is calcium (Ca) with 20 protons.<\/li>\n\n\n\n<li>A 2+ charge means the ion has lost 2 electrons.<\/li>\n\n\n\n<li>Therefore, the number of electrons in this ion is <strong>18<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>This result aligns with option <strong>D) 18<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The number of electrons in an ion with 20 protons and an ionic charge of 2+ is A) 24. B) 22. C) 20. D) 18. \u0411) 16 The correct answer and explanation is : The correct answer is B) 18. Explanation: The number of protons in an atom or ion determines its element, and this [&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-212114","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/212114","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=212114"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/212114\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=212114"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=212114"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=212114"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}