{"id":197649,"date":"2025-03-07T13:31:22","date_gmt":"2025-03-07T13:31:22","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=197649"},"modified":"2025-03-07T13:31:25","modified_gmt":"2025-03-07T13:31:25","slug":"two-isotope-of-chlorine-are-found-in-nature-cl-35-and-cl-37","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/07\/two-isotope-of-chlorine-are-found-in-nature-cl-35-and-cl-37\/","title":{"rendered":"Two isotope of chlorine are found in nature, Cl-35 and Cl-37"},"content":{"rendered":"\n

Two isotope of chlorine are found in nature, Cl-35 and Cl-37. The average mass or atomic weight of chlorine is 35.45 amu. The most abundant isotope of Cl has [A] 17 protons, 17 electrons, 18 neutrons [B] 17 protons, 17 electrons, 18.45 neutrons [C] 17 protons, 17 electrons, 20 neutrons [D] 18 protons, 18 electrons, 17 neutrons<\/p>\n\n\n\n

The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n

The correct answer is [A] 17 protons, 17 electrons, 18 neutrons<\/strong>.<\/p>\n\n\n\n

Explanation:<\/h3>\n\n\n\n

To understand this, let’s break down the given information:<\/p>\n\n\n\n

    \n
  1. Isotopes of Chlorine (Cl):<\/strong>
    Chlorine has two stable isotopes in nature:<\/li>\n<\/ol>\n\n\n\n
      \n
    • Cl-35<\/strong>: This isotope has a mass number of 35, meaning the sum of its protons and neutrons is 35.<\/li>\n\n\n\n
    • Cl-37<\/strong>: This isotope has a mass number of 37, meaning the sum of its protons and neutrons is 37.<\/li>\n<\/ul>\n\n\n\n
        \n
      1. Atomic Number and Protons:<\/strong>
        The atomic number of chlorine (Cl) is 17, which means every chlorine atom has 17 protons. This is the same for both isotopes. So, Cl-35<\/strong> and Cl-37<\/strong> both have 17 protons.<\/li>\n\n\n\n
      2. Neutrons:<\/strong>
        The number of neutrons in an isotope is determined by subtracting the number of protons from the mass number:<\/li>\n<\/ol>\n\n\n\n
          \n
        • For Cl-35<\/strong>, the number of neutrons is:
          ( 35 – 17 = 18 ) neutrons.<\/li>\n\n\n\n
        • For Cl-37<\/strong>, the number of neutrons is:
          ( 37 – 17 = 20 ) neutrons.<\/li>\n<\/ul>\n\n\n\n
            \n
          1. Electrons:<\/strong>
            In a neutral atom, the number of electrons is equal to the number of protons. Since chlorine has 17 protons, it must also have 17 electrons in a neutral state.<\/li>\n\n\n\n
          2. Atomic Weight:<\/strong>
            The atomic weight or average atomic mass of chlorine is given as 35.45 amu<\/strong>. This value is a weighted average based on the natural abundance of Cl-35<\/strong> (approximately 75.76%) and Cl-37<\/strong> (approximately 24.24%). The fact that the atomic weight is slightly above 35 indicates that Cl-35<\/strong> is the most abundant isotope, with Cl-37<\/strong> contributing a smaller fraction.<\/li>\n\n\n\n
          3. Conclusion:<\/strong>
            Since the most abundant isotope is Cl-35<\/strong>, it has 17 protons, 17 electrons, and 18 neutrons<\/strong>.<\/li>\n<\/ol>\n\n\n\n

            Thus, the correct answer is [A] 17 protons, 17 electrons, 18 neutrons<\/strong>.<\/p>\n\n\n\n

            Structure of a chlorine atom with 17 protons, 17 electrons, and 18 neutrons.<\/p>\n\n\n\n

            \"\"<\/figure>\n\n\n\n

            Here is the illustration of a chlorine atom (Cl) with 17 protons, 17 electrons, and 18 neutrons, representing the Cl-35 isotope. It shows the structure of the atom with the appropriate number of particles and their arrangement.<\/p>\n","protected":false},"excerpt":{"rendered":"

            Two isotope of chlorine are found in nature, Cl-35 and Cl-37. The average mass or atomic weight of chlorine is 35.45 amu. The most abundant isotope of Cl has [A] 17 protons, 17 electrons, 18 neutrons [B] 17 protons, 17 electrons, 18.45 neutrons [C] 17 protons, 17 electrons, 20 neutrons [D] 18 protons, 18 electrons, […]<\/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-197649","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/197649","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=197649"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/197649\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=197649"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=197649"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=197649"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}