{"id":270909,"date":"2025-07-25T12:15:38","date_gmt":"2025-07-25T12:15:38","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=270909"},"modified":"2025-07-25T12:15:40","modified_gmt":"2025-07-25T12:15:40","slug":"what-is-the-name-is-the-ionic-compound-cao-1-calcium-oxygen-2-calcium-oxide-3-calcium-i-oxide-4-calcium-ii-oxide","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/25\/what-is-the-name-is-the-ionic-compound-cao-1-calcium-oxygen-2-calcium-oxide-3-calcium-i-oxide-4-calcium-ii-oxide\/","title":{"rendered":"What is the name is the ionic compound CaO 1 calcium oxygen 2 calcium oxide 3 calcium (I) oxide 4 calcium (II) oxide"},"content":{"rendered":"\n<p>What is the name is the ionic compound CaO 1 calcium oxygen 2 calcium oxide 3 calcium (I) oxide 4 calcium (II) oxide<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-0-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>The correct name of the ionic compound <strong>CaO<\/strong> is <strong>calcium oxide<\/strong> (option 2).<\/p>\n\n\n\n<p>To understand this, let&#8217;s break it down:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Calcium (Ca)<\/strong> is an alkaline earth metal from Group 2 of the periodic table. It typically forms <strong>Ca\u00b2\u207a<\/strong> ions because it loses two electrons to achieve a stable electron configuration.<\/li>\n\n\n\n<li><strong>Oxygen (O)<\/strong> is a non-metal from Group 16 and forms <strong>O\u00b2\u207b<\/strong> ions when it gains two electrons to fill its outermost electron shell.<\/li>\n<\/ol>\n\n\n\n<p>When calcium and oxygen combine, calcium donates its two electrons to oxygen, resulting in the ionic compound <strong>CaO<\/strong>. The <strong>Ca\u00b2\u207a<\/strong> ions and <strong>O\u00b2\u207b<\/strong> ions attract each other due to electrostatic forces and form a stable ionic bond.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation of the Options:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Option 1: Calcium Oxygen<\/strong> is not a correct name. This would be used in a more informal or descriptive context, but not in formal naming of ionic compounds.<\/li>\n\n\n\n<li><strong>Option 3: Calcium (I) Oxide<\/strong> is incorrect. Calcium has a fixed charge of <strong>+2<\/strong>, not <strong>+1<\/strong>, so using &#8220;(I)&#8221; would be misleading. Ionic compounds formed by calcium do not need Roman numerals for the oxidation state, as calcium always has a <strong>+2<\/strong> charge.<\/li>\n\n\n\n<li><strong>Option 4: Calcium (II) Oxide<\/strong> is a valid name, but it is unnecessary because the <strong>(II)<\/strong> is redundant in this case. The oxidation state of calcium in <strong>CaO<\/strong> is always <strong>+2<\/strong>, so it&#8217;s unnecessary to specify it in the name.<\/li>\n<\/ul>\n\n\n\n<p>In summary, <strong>calcium oxide<\/strong> is the standard and correct name for <strong>CaO<\/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-banner6-2003.jpeg\" alt=\"\" class=\"wp-image-270910\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>What is the name is the ionic compound CaO 1 calcium oxygen 2 calcium oxide 3 calcium (I) oxide 4 calcium (II) oxide The Correct Answer and Explanation is: The correct name of the ionic compound CaO is calcium oxide (option 2). To understand this, let&#8217;s break it down: When calcium and oxygen combine, calcium [&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-270909","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/270909","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=270909"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/270909\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=270909"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=270909"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=270909"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}