{"id":237761,"date":"2025-06-17T15:04:22","date_gmt":"2025-06-17T15:04:22","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=237761"},"modified":"2025-06-17T15:04:24","modified_gmt":"2025-06-17T15:04:24","slug":"how-many-electrons-protons-and-neutrons-are-found-in-the-2-cation-of-the-barium-140-isotope","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/17\/how-many-electrons-protons-and-neutrons-are-found-in-the-2-cation-of-the-barium-140-isotope\/","title":{"rendered":"How many electrons, protons and neutrons are found in the +2 cation of the Barium -140 isotope."},"content":{"rendered":"\n<p>How many electrons, protons and neutrons are found in the +2 cation of the Barium -140 isotope.<\/p>\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><strong>Correct Answer:<\/strong><\/p>\n\n\n\n<p>The <strong>+2 cation of Barium-140<\/strong> has:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Electrons:<\/strong> 54<\/li>\n\n\n\n<li><strong>Protons:<\/strong> 56<\/li>\n\n\n\n<li><strong>Neutrons:<\/strong> 84<\/li>\n<\/ul>\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>To determine the number of electrons, protons, and neutrons in the +2 cation of Barium-140, we begin by analyzing the atomic structure of the neutral atom of barium.<\/p>\n\n\n\n<p>Barium is a chemical element with the atomic number <strong>56<\/strong>, which means a <strong>neutral atom<\/strong> of barium has <strong>56 protons<\/strong> and <strong>56 electrons<\/strong>. The atomic number defines the number of protons in the nucleus of an atom and also determines the element\u2019s identity.<\/p>\n\n\n\n<p>The term <strong>&#8220;Barium-140&#8221;<\/strong> refers to the <strong>isotope<\/strong> of barium with a <strong>mass number of 140<\/strong>. The mass number is the total count of <strong>protons and neutrons<\/strong> in the nucleus. Since barium always has 56 protons, the number of <strong>neutrons<\/strong> in this isotope is calculated by subtracting the number of protons from the mass number:<\/p>\n\n\n\n<p><strong>140 (mass number) &#8211; 56 (protons) = 84 neutrons<\/strong><\/p>\n\n\n\n<p>Now, consider the <strong>+2 cation<\/strong> of Barium-140. A cation is a positively charged ion, formed when an atom loses one or more electrons. The +2 charge indicates that <strong>two electrons have been lost<\/strong>. Therefore, the number of <strong>electrons<\/strong> in the +2 cation is:<\/p>\n\n\n\n<p><strong>56 (original electrons in neutral atom) &#8211; 2 = 54 electrons<\/strong><\/p>\n\n\n\n<p>To summarize:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The number of <strong>protons<\/strong> remains constant at 56 because removing electrons does not affect the nucleus.<\/li>\n\n\n\n<li>The number of <strong>neutrons<\/strong> is 84, based on the isotope&#8217;s mass number.<\/li>\n\n\n\n<li>The number of <strong>electrons<\/strong> is reduced to 54 due to the +2 charge.<\/li>\n<\/ul>\n\n\n\n<p>These properties help explain how ions behave in chemical reactions and influence the atomic structure and reactivity of elements like barium.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner10-241.jpeg\" alt=\"\" class=\"wp-image-237762\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>How many electrons, protons and neutrons are found in the +2 cation of the Barium -140 isotope. The Correct Answer and Explanation is: Correct Answer: The +2 cation of Barium-140 has: Explanation To determine the number of electrons, protons, and neutrons in the +2 cation of Barium-140, we begin by analyzing the atomic structure of [&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-237761","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/237761","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=237761"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/237761\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=237761"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=237761"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=237761"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}