{"id":264909,"date":"2025-07-21T16:57:52","date_gmt":"2025-07-21T16:57:52","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=264909"},"modified":"2025-07-21T16:57:59","modified_gmt":"2025-07-21T16:57:59","slug":"how-many-neutrons-are-contained-in-an-iodine-nucleus-with-a-mass-number-of-131","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/21\/how-many-neutrons-are-contained-in-an-iodine-nucleus-with-a-mass-number-of-131\/","title":{"rendered":"How many neutrons are contained in an iodine nucleus with a mass number of 131"},"content":{"rendered":"\n<p>How many neutrons are contained in an iodine nucleus with a mass number of 131? <\/p>\n\n\n\n<p>Group of answer choices<\/p>\n\n\n\n<p> a. 53 <\/p>\n\n\n\n<p>b. 127 <\/p>\n\n\n\n<p>c. 131 <\/p>\n\n\n\n<p>d. 74 <\/p>\n\n\n\n<p>e. 78<\/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 correct answer is <strong>d. 74<\/strong>.<\/p>\n\n\n\n<p>Explanation:<br>To find the number of neutrons in an atom, you can use the following formula:<\/p>\n\n\n\n<p><strong>Number of neutrons = Mass number &#8211; Atomic number<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Mass number<\/strong> refers to the total number of protons and neutrons in the nucleus.<\/li>\n\n\n\n<li><strong>Atomic number<\/strong> refers to the number of protons in the nucleus of the atom, which also determines the element.<\/li>\n<\/ul>\n\n\n\n<p>For iodine (I), the atomic number is 53. This means iodine has 53 protons. The given mass number of iodine is 131.<\/p>\n\n\n\n<p>Now, substitute these values into the formula:<\/p>\n\n\n\n<p><strong>Number of neutrons = 131 (mass number) &#8211; 53 (atomic number)<\/strong><\/p>\n\n\n\n<p><strong>Number of neutrons = 78<\/strong><\/p>\n\n\n\n<p>So, iodine with a mass number of 131 contains <strong>78 neutrons<\/strong>. The correct option is <strong>e. 78<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>How many neutrons are contained in an iodine nucleus with a mass number of 131? Group of answer choices a. 53 b. 127 c. 131 d. 74 e. 78 The correct answer and explanation is: The correct answer is d. 74. Explanation:To find the number of neutrons in an atom, you can use the following [&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-264909","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/264909","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=264909"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/264909\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=264909"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=264909"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=264909"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}