{"id":32553,"date":"2025-06-22T15:31:43","date_gmt":"2025-06-22T15:31:43","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=32553"},"modified":"2025-06-22T15:31:45","modified_gmt":"2025-06-22T15:31:45","slug":"how-many-electrons-are-contained-in-an-ion-formed-from-an-atom-of-cs","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/how-many-electrons-are-contained-in-an-ion-formed-from-an-atom-of-cs\/","title":{"rendered":"How many electrons are contained in an ion formed from an atom of Cs"},"content":{"rendered":"\n<p>How many electrons are contained in an ion formed from an atom of Cs? How many electrons are contained in an ion formed from an atom of Se<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p><strong>Correct Answers:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>An ion formed from a Cs (cesium) atom contains 54 electrons.<\/strong><\/li>\n\n\n\n<li><strong>An ion formed from a Se (selenium) atom contains 36 electrons.<\/strong><\/li>\n<\/ol>\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 in an ion formed from a given atom, you must first understand the <strong>atomic number<\/strong> of the element and how it behaves when forming ions.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>1. Cesium (Cs):<\/strong><\/h3>\n\n\n\n<p>Cesium has an atomic number of <strong>55<\/strong>, which means a <strong>neutral cesium atom<\/strong> contains <strong>55 protons<\/strong> and <strong>55 electrons<\/strong>.<\/p>\n\n\n\n<p>Cesium is an <strong>alkali metal<\/strong> and is located in <strong>Group 1<\/strong> of the periodic table. Atoms in this group tend to <strong>lose one electron<\/strong> to achieve a stable electron configuration similar to the nearest noble gas (xenon in this case).<\/p>\n\n\n\n<p>When cesium <strong>loses one electron<\/strong>, it forms a <strong>Cs\u207a ion<\/strong>.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The number of protons remains the same (55).<\/li>\n\n\n\n<li>It loses one electron, so it now has <strong>55 &#8211; 1 = 54 electrons<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>Therefore, a Cs\u207a ion contains <strong>54 electrons<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>2. Selenium (Se):<\/strong><\/h3>\n\n\n\n<p>Selenium has an atomic number of <strong>34<\/strong>, so a <strong>neutral selenium atom<\/strong> has <strong>34 protons<\/strong> and <strong>34 electrons<\/strong>.<\/p>\n\n\n\n<p>Selenium is a <strong>nonmetal<\/strong> located in <strong>Group 16<\/strong>. Atoms in this group tend to <strong>gain two electrons<\/strong> to complete their outer shell and resemble the noble gas krypton.<\/p>\n\n\n\n<p>When selenium <strong>gains two electrons<\/strong>, it forms a <strong>Se\u00b2\u207b ion<\/strong>.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The number of protons remains at 34.<\/li>\n\n\n\n<li>It gains two electrons, so it now has <strong>34 + 2 = 36 electrons<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>Thus, a Se\u00b2\u207b ion contains <strong>36 electrons<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>In conclusion:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Cs forms a <strong>positive ion<\/strong> (cation) by <strong>losing<\/strong> one electron, resulting in <strong>54 electrons<\/strong>.<\/li>\n\n\n\n<li>Se forms a <strong>negative ion<\/strong> (anion) by <strong>gaining<\/strong> two electrons, resulting in <strong>36 electrons<\/strong>.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"852\" height=\"1024\" src=\"https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-404.jpeg\" alt=\"\" class=\"wp-image-32554\" srcset=\"https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-404.jpeg 852w, https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-404-250x300.jpeg 250w, https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-404-768x923.jpeg 768w\" sizes=\"auto, (max-width: 852px) 100vw, 852px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>How many electrons are contained in an ion formed from an atom of Cs? How many electrons are contained in an ion formed from an atom of Se The Correct Answer and Explanation is: Correct Answers: Explanation: To determine the number of electrons in an ion formed from a given atom, you must first understand [&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-32553","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/32553","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=32553"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/32553\/revisions"}],"predecessor-version":[{"id":32555,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/32553\/revisions\/32555"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=32553"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=32553"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=32553"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}