{"id":25655,"date":"2025-06-19T06:05:41","date_gmt":"2025-06-19T06:05:41","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=25655"},"modified":"2025-06-19T06:05:43","modified_gmt":"2025-06-19T06:05:43","slug":"what-is-the-formula-for-an-ionic-compound-made-of-aluminum-and-oxygen","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/what-is-the-formula-for-an-ionic-compound-made-of-aluminum-and-oxygen\/","title":{"rendered":"What is the formula for an ionic compound made of aluminum and oxygen"},"content":{"rendered":"\n<p>What is the formula for an ionic compound made of aluminum and oxygen? A) AlO2 B) Al2O3 C) Al3O2 D) AlO E) none of the above<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-green-cyan-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p><strong>Correct Answer: B) Al\u2082O\u2083<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>To determine the correct formula of an <strong>ionic compound<\/strong> formed between <strong>aluminum<\/strong> and <strong>oxygen<\/strong>, we must consider the charges of the ions involved.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 1: Determine the Ions<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Aluminum (Al)<\/strong> is a metal found in Group 13 of the periodic table. It tends to <strong>lose 3 electrons<\/strong> to form a <strong>+3 cation (Al\u00b3\u207a)<\/strong>.<\/li>\n\n\n\n<li><strong>Oxygen (O)<\/strong> is a non-metal in Group 16. It tends to <strong>gain 2 electrons<\/strong> to form a <strong>\u22122 anion (O\u00b2\u207b)<\/strong>.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\">Step 2: Balance the Charges<\/h4>\n\n\n\n<p>An ionic compound must be <strong>electrically neutral<\/strong>, meaning the total positive charge must balance the total negative charge.<\/p>\n\n\n\n<p>Let\u2019s use the <strong>criss-cross method<\/strong> to find the lowest ratio of ions that balances the charges:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Al\u00b3\u207a and O\u00b2\u207b<\/li>\n\n\n\n<li>Cross the charges to find the subscripts:\n<ul class=\"wp-block-list\">\n<li>Al: 2 (from O\u2019s charge)<\/li>\n\n\n\n<li>O: 3 (from Al\u2019s charge)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p>This gives us the formula <strong>Al\u2082O\u2083<\/strong>.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 3: Verify Neutrality<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>2 aluminum ions: 2 \u00d7 (+3) = +6<\/li>\n\n\n\n<li>3 oxide ions: 3 \u00d7 (\u22122) = \u22126<\/li>\n\n\n\n<li>Total charge = +6 \u2212 6 = 0<\/li>\n<\/ul>\n\n\n\n<p>So, <strong>Al\u2082O\u2083<\/strong> is a <strong>neutral compound<\/strong>, making it the correct formula.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\">Step 4: Why Other Choices Are Incorrect<\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>A) AlO\u2082<\/strong>: Implies a +3 aluminum with two oxide ions, but the total charge would be \u22124 + 3 = \u22121, not neutral.<\/li>\n\n\n\n<li><strong>C) Al\u2083O\u2082<\/strong>: Charges would be 3\u00d7(+3) = +9, and 2\u00d7(\u22122) = \u22124, total = +5, not neutral.<\/li>\n\n\n\n<li><strong>D) AlO<\/strong>: +3 and \u22122 gives total = +1, not neutral.<\/li>\n\n\n\n<li><strong>E) none of the above<\/strong>: Incorrect, because <strong>B is correct<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>Thus, the correct formula is <strong>B) Al\u2082O\u2083<\/strong>.<\/p>\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-banner8-76.jpeg\" alt=\"\" class=\"wp-image-25656\" srcset=\"https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-76.jpeg 852w, https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-76-250x300.jpeg 250w, https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-76-768x923.jpeg 768w\" sizes=\"auto, (max-width: 852px) 100vw, 852px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>What is the formula for an ionic compound made of aluminum and oxygen? A) AlO2 B) Al2O3 C) Al3O2 D) AlO E) none of the above The Correct Answer and Explanation is: Correct Answer: B) Al\u2082O\u2083 Explanation: To determine the correct formula of an ionic compound formed between aluminum and oxygen, we must consider the [&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-25655","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/25655","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=25655"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/25655\/revisions"}],"predecessor-version":[{"id":25657,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/25655\/revisions\/25657"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=25655"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=25655"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=25655"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}