{"id":249249,"date":"2025-07-09T06:03:42","date_gmt":"2025-07-09T06:03:42","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=249249"},"modified":"2025-07-09T06:03:46","modified_gmt":"2025-07-09T06:03:46","slug":"the-mass-of-a-neutron-is-equal-to-the-mass-of-a-proton-plus-the-mass-of-an-electron","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/09\/the-mass-of-a-neutron-is-equal-to-the-mass-of-a-proton-plus-the-mass-of-an-electron\/","title":{"rendered":"The mass of a neutron is equal to the mass of a proton plus the mass of an electron"},"content":{"rendered":"\n<p>The mass of a neutron is equal to the mass of a proton plus the mass of an electron<\/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 statement that the mass of a neutron is equal to the mass of a proton plus the mass of an electron is incorrect. In fact, the mass of a neutron is slightly greater than the combined mass of a proton and an electron.<\/p>\n\n\n\n<p>To understand why, let\u2019s first examine the masses of the individual particles:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The <strong>mass of a proton<\/strong> is approximately 1.6726\u00d710\u2212271.6726 \\times 10^{-27}1.6726\u00d710\u221227 kg.<\/li>\n\n\n\n<li>The <strong>mass of a neutron<\/strong> is about 1.6750\u00d710\u2212271.6750 \\times 10^{-27}1.6750\u00d710\u221227 kg.<\/li>\n\n\n\n<li>The <strong>mass of an electron<\/strong> is much smaller, approximately 9.109\u00d710\u2212319.109 \\times 10^{-31}9.109\u00d710\u221231 kg.<\/li>\n<\/ul>\n\n\n\n<p>If we add the mass of a proton to the mass of an electron, the sum is:1.6726\u00d710\u221227\u2009kg+9.109\u00d710\u221231\u2009kg=1.6735\u00d710\u221227\u2009kg1.6726 \\times 10^{-27} \\, \\text{kg} + 9.109 \\times 10^{-31} \\, \\text{kg} = 1.6735 \\times 10^{-27} \\, \\text{kg}1.6726\u00d710\u221227kg+9.109\u00d710\u221231kg=1.6735\u00d710\u221227kg<\/p>\n\n\n\n<p>As we can see, this value is still less than the mass of a neutron (1.6750\u00d710\u221227\u2009kg1.6750 \\times 10^{-27} \\, \\text{kg}1.6750\u00d710\u221227kg).<\/p>\n\n\n\n<p>The neutron&#8217;s mass is actually very close to the proton&#8217;s mass, but slightly greater. This is due to the additional energy associated with the binding of the quarks within the neutron. Both protons and neutrons are made up of quarks, and while the masses of the quarks themselves contribute to the total mass, the strong nuclear force that holds them together contributes a small amount of additional mass to the neutron. This is why the neutron is heavier than the proton by a very small amount.<\/p>\n\n\n\n<p>So, while the neutron and proton are nearly identical in mass, the neutron&#8217;s mass is not the result of simply adding the masses of a proton and an electron. The idea of comparing them in this manner oversimplifies the actual differences in mass due to particle interactions and binding energies.<\/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.jpeg\" alt=\"\" class=\"wp-image-249250\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>The mass of a neutron is equal to the mass of a proton plus the mass of an electron The Correct Answer and Explanation is: The statement that the mass of a neutron is equal to the mass of a proton plus the mass of an electron is incorrect. In fact, the mass of a [&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-249249","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/249249","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=249249"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/249249\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=249249"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=249249"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=249249"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}