{"id":28554,"date":"2025-06-20T13:35:54","date_gmt":"2025-06-20T13:35:54","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=28554"},"modified":"2025-06-20T13:36:01","modified_gmt":"2025-06-20T13:36:01","slug":"a-metal-m-forms-an-oxide-having-the-formula-m2o3-2","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/a-metal-m-forms-an-oxide-having-the-formula-m2o3-2\/","title":{"rendered":"A metal M forms an oxide having the formula M2O3"},"content":{"rendered":"\n<p>A metal M forms an oxide having the formula M2O3. It belongs to the third period. Write the atomic number and valency of the metal.<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\"><strong>The correct answer and explanation is:<\/strong><\/mark><\/p>\n\n\n\n<p><strong>Correct Answer:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Atomic number of metal M:<\/strong> 13<\/li>\n\n\n\n<li><strong>Valency of metal M:<\/strong> 3<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Explanation (Approx. 300 Words)<\/strong><\/h3>\n\n\n\n<p>The oxide of the metal is given as <strong>M\u2082O\u2083<\/strong>. To deduce the atomic number and valency of the metal, let&#8217;s analyze the chemical formula:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Determine the valency:<\/strong>\n<ul class=\"wp-block-list\">\n<li>Oxygen typically has a valency of <strong>\u20132<\/strong>.<\/li>\n\n\n\n<li>In M\u2082O\u2083, there are 3 oxygen atoms, each contributing \u20132, giving a total charge of \u20136.<\/li>\n\n\n\n<li>To balance this, the two metal atoms must together contribute a total of +6 charge.<\/li>\n\n\n\n<li>Therefore, each metal atom contributes +3.<\/li>\n\n\n\n<li><strong>Valency of metal M is +3.<\/strong><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Identify the metal from Period 3 with +3 valency:<\/strong>\n<ul class=\"wp-block-list\">\n<li>The third period of the periodic table includes the following elements (atomic numbers in parentheses):\n<ul class=\"wp-block-list\">\n<li>Na (11), Mg (12), Al (13), Si (14), P (15), S (16), Cl (17), Ar (18)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Among these, <strong>aluminum (Al)<\/strong> is the only metal that:\n<ul class=\"wp-block-list\">\n<li>Forms an oxide with the formula <strong>Al\u2082O\u2083<\/strong><\/li>\n\n\n\n<li>Has a <strong>+3 valency<\/strong><\/li>\n\n\n\n<li>Is located in the <strong>third period<\/strong><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Confirm atomic number:<\/strong>\n<ul class=\"wp-block-list\">\n<li>Aluminum (Al) has the atomic number <strong>13<\/strong><\/li>\n\n\n\n<li>So, <strong>metal M is aluminum<\/strong>, with atomic number <strong>13<\/strong> and valency <strong>3<\/strong><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Conclusion:<\/strong><br>The oxide <strong>M\u2082O\u2083<\/strong> is aluminum oxide (<strong>Al\u2082O\u2083<\/strong>), where each Al atom has a valency of +3. Since aluminum is in Period 3 and has atomic number 13, the correct answers are:\n<ul class=\"wp-block-list\">\n<li><strong>Atomic number:<\/strong> 13<\/li>\n\n\n\n<li><strong>Valency:<\/strong> 3<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>This demonstrates how the chemical formula of a compound, combined with periodic table knowledge, allows us to deduce fundamental properties of an element.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A metal M forms an oxide having the formula M2O3. It belongs to the third period. Write the atomic number and valency of the metal. The correct answer and explanation is: Correct Answer: Explanation (Approx. 300 Words) The oxide of the metal is given as M\u2082O\u2083. To deduce the atomic number and valency of 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-28554","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/28554","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=28554"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/28554\/revisions"}],"predecessor-version":[{"id":28555,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/28554\/revisions\/28555"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=28554"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=28554"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=28554"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}