{"id":138146,"date":"2024-09-14T07:36:09","date_gmt":"2024-09-14T07:36:09","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=138146"},"modified":"2024-09-14T07:36:12","modified_gmt":"2024-09-14T07:36:12","slug":"if-a-represents-atomic-mass-and-z-represents-atomic-number","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2024\/09\/14\/if-a-represents-atomic-mass-and-z-represents-atomic-number\/","title":{"rendered":"If A represents atomic mass and Z represents atomic number"},"content":{"rendered":"\n<p>If A represents atomic mass and Z represents atomic number, which of the following describes an atom after a proton is emitted from its nucleus?<\/p>\n\n\n\n<p>A.<br>A-1,Z+1<\/p>\n\n\n\n<p>B.<br>A+1,Z-1<\/p>\n\n\n\n<p>C.<br>A-1,Z-1<\/p>\n\n\n\n<p>D.<br>A+1,Z+1<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The correct answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n<p>The correct answer is <strong>C. A-1, Z-1<\/strong>.<\/p>\n\n\n\n<p><strong>Explanation:<\/strong><\/p>\n\n\n\n<p>When a proton is emitted from the nucleus of an atom, the process is known as <strong>proton emission<\/strong>. This is a type of radioactive decay where the atom&#8217;s nucleus releases a proton, which is a positively charged particle.<\/p>\n\n\n\n<p>Let\u2019s break down how this emission affects the atomic mass (A) and the atomic number (Z) of the atom:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Atomic Number (Z):<\/strong> The atomic number represents the number of protons in the nucleus of an atom. When a proton is emitted, the number of protons in the nucleus decreases by one. Therefore, the new atomic number becomes ( Z-1 ).<\/li>\n\n\n\n<li><strong>Atomic Mass (A):<\/strong> The atomic mass is the sum of protons and neutrons in the nucleus. When a proton is emitted, the number of nucleons (protons and neutrons) in the nucleus decreases by one. Thus, the atomic mass also decreases by one. Hence, the new atomic mass becomes ( A-1 ).<\/li>\n<\/ol>\n\n\n\n<p>For example, if we start with an atom of element X with atomic number Z and atomic mass A, emitting a proton changes the atom into a new element with an atomic number of ( Z-1 ) and an atomic mass of ( A-1 ).<\/p>\n\n\n\n<p>To summarize:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Before emission: Atomic number = Z, Atomic mass = A<\/li>\n\n\n\n<li>After proton emission: Atomic number = ( Z-1 ), Atomic mass = ( A-1 )<\/li>\n<\/ul>\n\n\n\n<p>Thus, the resulting atom will be represented as having ( A-1 ) as the new atomic mass and ( Z-1 ) as the new atomic number. This explains why option C (A-1, Z-1) correctly describes the atom after a proton is emitted.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>If A represents atomic mass and Z represents atomic number, which of the following describes an atom after a proton is emitted from its nucleus? A.A-1,Z+1 B.A+1,Z-1 C.A-1,Z-1 D.A+1,Z+1 The correct answer and Explanation is : The correct answer is C. A-1, Z-1. Explanation: When a proton is emitted from the nucleus of an atom, [&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-138146","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/138146","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=138146"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/138146\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=138146"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=138146"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=138146"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}