{"id":225595,"date":"2025-06-04T10:31:27","date_gmt":"2025-06-04T10:31:27","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=225595"},"modified":"2025-06-04T10:31:36","modified_gmt":"2025-06-04T10:31:36","slug":"which-symbols-represent-atoms-that-are-isotopes-of-each-other","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/04\/which-symbols-represent-atoms-that-are-isotopes-of-each-other\/","title":{"rendered":"Which symbols represent atoms that are isotopes of each other"},"content":{"rendered":"\n

Which symbols represent atoms that are isotopes of each other? A
and
B
and
C
and
D
and<\/p>\n\n\n\n

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

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

Correct Answer: C \u2014 \u00b9\u2076O and \u00b9\u2078O<\/strong><\/p>\n\n\n\n

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

To determine which pairs represent isotopes, we need to understand what isotopes are. Isotopes are atoms of the same element (same number of protons) but with different numbers of neutrons.<\/strong> This means they must have the same atomic number (same element) but different mass numbers (different total number of protons and neutrons).<\/p>\n\n\n\n

Let\u2019s evaluate each option:<\/p>\n\n\n\n

\n\n\n\n

A. \u00b9\u2074C and \u00b9\u2074N<\/strong><\/p>\n\n\n\n

    \n
  • \u00b9\u2074C has 6 protons (carbon), and \u00b9\u2074N has 7 protons (nitrogen).<\/li>\n\n\n\n
  • Different elements \u2192 Not isotopes<\/strong><\/li>\n<\/ul>\n\n\n\n
    \n\n\n\n

    B. \u00b9\u00b3\u00b9I and \u00b9\u00b3\u00b9I\u207b<\/strong><\/p>\n\n\n\n

      \n
    • Both are iodine with mass number 131.<\/li>\n\n\n\n
    • One is a neutral atom; the other is an ion (with one extra electron).<\/li>\n\n\n\n
    • Same number of protons and neutrons \u2192 Same isotope<\/strong><\/li>\n\n\n\n
    • But this is not a pair of different<\/em> isotopes \u2014 they are the same isotope in different ionic forms<\/em> \u2192 Not correct<\/strong><\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n

      C. \u00b9\u2076O and \u00b9\u2078O<\/strong><\/p>\n\n\n\n

        \n
      • Both are oxygen atoms (8 protons), but have different mass numbers: 16 and 18.<\/li>\n\n\n\n
      • This means \u00b9\u2076O has 8 neutrons and \u00b9\u2078O has 10 neutrons.<\/li>\n\n\n\n
      • Same element, different number of neutrons \u2192 They are isotopes of each other<\/strong><\/li>\n\n\n\n
      • \u2705 Correct<\/strong><\/li>\n<\/ul>\n\n\n\n
        \n\n\n\n

        D. \u00b2\u00b2\u00b2Rn and \u00b2\u00b2\u00b2Ra<\/strong><\/p>\n\n\n\n

          \n
        • \u00b2\u00b2\u00b2Rn (radon) has 86 protons; \u00b2\u00b2\u00b2Ra (radium) has 88 protons.<\/li>\n\n\n\n
        • Different elements \u2192 Not isotopes<\/strong><\/li>\n<\/ul>\n\n\n\n
          \n\n\n\n

          Conclusion:<\/h3>\n\n\n\n

          Option C (\u00b9\u2076O and \u00b9\u2078O)<\/strong> is correct because these are atoms of the same element (oxygen) with different numbers of neutrons, which is the definition of isotopes. This distinction is important in nuclear chemistry, medicine, and environmental science, where different isotopes behave the same chemically but can differ in stability and radioactivity.<\/p>\n\n\n\n

          \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

          Which symbols represent atoms that are isotopes of each other? AandBandCandDand The Correct Answer and Explanation is: Correct Answer: C \u2014 \u00b9\u2076O and \u00b9\u2078O Explanation: To determine which pairs represent isotopes, we need to understand what isotopes are. Isotopes are atoms of the same element (same number of protons) but with different numbers of neutrons. […]<\/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-225595","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/225595","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=225595"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/225595\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=225595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=225595"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=225595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}