{"id":260642,"date":"2025-07-19T15:52:51","date_gmt":"2025-07-19T15:52:51","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=260642"},"modified":"2025-07-19T15:52:53","modified_gmt":"2025-07-19T15:52:53","slug":"what-is-the-average-atomic-mass-of-zinc","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/19\/what-is-the-average-atomic-mass-of-zinc\/","title":{"rendered":"What is the average atomic mass of zinc"},"content":{"rendered":"\n<p>What is the average atomic mass of zinc?<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\">The correct answer and explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>The average atomic mass of zinc is approximately <strong>65.38 u (unified atomic mass units)<\/strong>.<\/p>\n\n\n\n<p>The atomic mass of an element represents the weighted average of the masses of all naturally occurring isotopes of that element. Zinc has five stable isotopes: <strong>^64Zn<\/strong>, <strong>^66Zn<\/strong>, <strong>^67Zn<\/strong>, <strong>^68Zn<\/strong>, and <strong>^70Zn<\/strong>, each with different relative abundances and atomic masses. To calculate the average atomic mass, you must consider both the mass of each isotope and its abundance in nature.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>^64Zn<\/strong> has an atomic mass of approximately <strong>63.929 u<\/strong> and accounts for about <strong>48.6%<\/strong> of naturally occurring zinc.<\/li>\n\n\n\n<li><strong>^66Zn<\/strong> has an atomic mass of approximately <strong>65.926 u<\/strong> and makes up about <strong>27.9%<\/strong> of the natural zinc.<\/li>\n\n\n\n<li><strong>^67Zn<\/strong> has an atomic mass of approximately <strong>66.927 u<\/strong> and constitutes around <strong>4.1%<\/strong> of zinc.<\/li>\n\n\n\n<li><strong>^68Zn<\/strong> has an atomic mass of approximately <strong>67.925 u<\/strong> and is about <strong>18.8%<\/strong> of the natural zinc.<\/li>\n\n\n\n<li><strong>^70Zn<\/strong> has an atomic mass of approximately <strong>69.925 u<\/strong> and makes up about <strong>0.6%<\/strong> of naturally occurring zinc.<\/li>\n<\/ul>\n\n\n\n<p>To find the average atomic mass of zinc, multiply the atomic mass of each isotope by its relative abundance (as a decimal) and then sum these values: (63.929\u00d70.486)+(65.926\u00d70.279)+(66.927\u00d70.041)+(67.925\u00d70.188)+(69.925\u00d70.006)(63.929 \\times 0.486) + (65.926 \\times 0.279) + (66.927 \\times 0.041) + (67.925 \\times 0.188) + (69.925 \\times 0.006)<\/p>\n\n\n\n<p>The result is approximately <strong>65.38 u<\/strong>, which is the average atomic mass of zinc.<\/p>\n\n\n\n<p>This average value is what is typically used in chemical calculations. It reflects the distribution of isotopes in nature and allows for a more accurate representation of the element&#8217;s mass in reactions and other applications.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What is the average atomic mass of zinc? The correct answer and explanation is: The average atomic mass of zinc is approximately 65.38 u (unified atomic mass units). The atomic mass of an element represents the weighted average of the masses of all naturally occurring isotopes of that element. Zinc has five stable isotopes: ^64Zn, [&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-260642","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/260642","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=260642"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/260642\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=260642"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=260642"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=260642"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}