{"id":201362,"date":"2025-03-15T09:05:12","date_gmt":"2025-03-15T09:05:12","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=201362"},"modified":"2025-03-15T09:05:14","modified_gmt":"2025-03-15T09:05:14","slug":"for-the-isotope-17o2-the-number-of-protons-neutrons-and-electrons","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/15\/for-the-isotope-17o2-the-number-of-protons-neutrons-and-electrons\/","title":{"rendered":"For the isotope 17O2-, the number of protons, neutrons, and electrons"},"content":{"rendered":"\n

For the isotope 17O2-, the number of protons, neutrons, and electrons are:<\/p>\n\n\n\n

a) 6 protons, 9 neutrons, and 6 electrons<\/p>\n\n\n\n

b) 8 protons, 8 neutrons, and 8 electrons<\/p>\n\n\n\n

c) 8 protons, 17 neutrons, and 8 electrons<\/p>\n\n\n\n

d) 8 protons, 9 neutrons, and 10 electrons<\/p>\n\n\n\n

e) 7 protons, 10 neutrons, and 10 electrons<\/p>\n\n\n\n

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

The correct answer is d) 8 protons, 9 neutrons, and 10 electrons<\/strong>.<\/p>\n\n\n\n

Let’s break down why this is the correct answer.<\/p>\n\n\n\n

1. Understanding the Isotope Notation:<\/strong><\/h3>\n\n\n\n

The isotope is given as 17O2-<\/strong>. In this notation:<\/p>\n\n\n\n

    \n
  • O<\/strong> stands for oxygen.<\/li>\n\n\n\n
  • The number “17” represents the mass number<\/strong> (the sum of protons and neutrons) of the isotope.<\/li>\n\n\n\n
  • The “2-” signifies that the atom has gained two extra electrons, meaning it has a negative charge<\/strong> of 2.<\/li>\n<\/ul>\n\n\n\n

    2. Number of Protons (Atomic Number):<\/strong><\/h3>\n\n\n\n
      \n
    • Oxygen (O) has an atomic number of 8<\/strong>, meaning it has 8 protons<\/strong>. The atomic number is always equal to the number of protons in an element.<\/li>\n<\/ul>\n\n\n\n

      3. Number of Neutrons:<\/strong><\/h3>\n\n\n\n
        \n
      • The mass number<\/strong> of this isotope is 17. The mass number is the sum of protons and neutrons.<\/li>\n\n\n\n
      • To calculate the number of neutrons, subtract the number of protons from the mass number:
        [
        \\text{Neutrons} = \\text{Mass Number} – \\text{Protons} = 17 – 8 = 9
        ]<\/li>\n\n\n\n
      • Therefore, this isotope has 9 neutrons<\/strong>.<\/li>\n<\/ul>\n\n\n\n

        4. Number of Electrons:<\/strong><\/h3>\n\n\n\n
          \n
        • The neutral form of oxygen would have the same number of electrons as protons, so in a neutral oxygen atom, the number of electrons would be 8<\/strong>.<\/li>\n\n\n\n
        • However, the 2- charge<\/strong> indicates that the atom has gained two extra electrons, so the number of electrons is:
          [
          \\text{Electrons} = 8 \\, (\\text{protons}) + 2 = 10
          ]<\/li>\n\n\n\n
        • Therefore, this isotope has 10 electrons<\/strong>.<\/li>\n<\/ul>\n\n\n\n

          5. Summary:<\/strong><\/h3>\n\n\n\n
            \n
          • The 17O2-<\/strong> isotope has:\n
              \n
            • 8 protons<\/strong> (since it’s oxygen),<\/li>\n\n\n\n
            • 9 neutrons<\/strong> (17 – 8 = 9),<\/li>\n\n\n\n
            • 10 electrons<\/strong> (due to the 2- charge).<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n

              Thus, the correct answer is d) 8 protons, 9 neutrons, and 10 electrons<\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"

              For the isotope 17O2-, the number of protons, neutrons, and electrons are: a) 6 protons, 9 neutrons, and 6 electrons b) 8 protons, 8 neutrons, and 8 electrons c) 8 protons, 17 neutrons, and 8 electrons d) 8 protons, 9 neutrons, and 10 electrons e) 7 protons, 10 neutrons, and 10 electrons The correct answer […]<\/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-201362","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/201362","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=201362"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/201362\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=201362"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=201362"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=201362"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}