{"id":3661,"date":"2023-01-09T10:11:47","date_gmt":"2023-01-09T10:11:47","guid":{"rendered":"https:\/\/9thclass.deltapublications.in\/?page_id=3661"},"modified":"2025-01-06T17:25:01","modified_gmt":"2025-01-06T17:25:01","slug":"s-4-f-isotopes","status":"publish","type":"page","link":"https:\/\/9thclass.deltapublications.in\/index.php\/s-4-f-isotopes\/","title":{"rendered":"S-4.f Isotopes"},"content":{"rendered":"\n<h2 class=\"wp-block-heading has-text-align-center has-text-color\" style=\"color:#00056d;text-transform:uppercase\"><strong>Isotopes<\/strong><\/h2>\n\n\n\n<p class=\"has-text-color has-huge-font-size\" style=\"color:#74008b\"><strong>Key Notes:<\/strong><\/p>\n\n\n\n<p class=\"has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-26c4c74d29148c572200aef831bc3f5d\" style=\"color:#000060;background-color:#dfc816\"><strong>Definition of Isotopes<\/strong>:<\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li>Isotopes are atoms of the same element that have the same number of protons but a different number of neutrons.<\/li>\n\n\n\n<li>This means isotopes have the same atomic number but different mass numbers.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-e71661ab64e137ab8ffdf6a785f9a6cf\" style=\"color:#000060;background-color:#dfc816\"><strong>Example of Isotopes<\/strong>:<\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li>The most common example is Carbon:\n<ul class=\"wp-block-list\">\n<li><strong>Carbon-12<\/strong> has 6 protons and 6 neutrons.<\/li>\n\n\n\n<li><strong>Carbon-13<\/strong> has 6 protons and 7 neutrons.<\/li>\n\n\n\n<li><strong>Carbon-14<\/strong> has 6 protons and 8 neutrons.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Despite having different mass numbers, all three isotopes of carbon behave chemically the same.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-c4140059cf37ddcf48f768d2d7dd0766\" style=\"color:#000060;background-color:#dfc816\"><strong>Atomic Number and Mass Number<\/strong>:<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"700\" height=\"268\" src=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2024\/11\/Untitled-design-48.png\" alt=\"\" class=\"wp-image-15870\" srcset=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2024\/11\/Untitled-design-48.png 700w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2024\/11\/Untitled-design-48-300x115.png 300w\" sizes=\"auto, (max-width: 700px) 100vw, 700px\" \/><\/figure><\/div>\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li><strong>Atomic number (Z)<\/strong> represents the number of protons in the nucleus and remains the same for isotopes of an element.<\/li>\n\n\n\n<li><strong>Mass number (A)<\/strong> is the sum of protons and neutrons in the nucleus and varies among isotopes.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-9da6c67601624ef337ceaa0607b0d951\" style=\"color:#000060;background-color:#dfc816\"><strong>Representation of Isotopes<\/strong>:<\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li>Isotopes are denoted using the element symbol followed by the mass number. For example, Carbon-12&nbsp;(<sup>12<\/sup>C)<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-26ae4d9d9089f0df3411519f9f512786\" style=\"color:#000060;background-color:#dfc816\"><strong>Physical vs. Chemical Properties<\/strong>:<\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li>Isotopes of an element have <strong>identical chemical properties<\/strong> because they have the same electron configuration.<\/li>\n\n\n\n<li>They may have <strong>different physical properties<\/strong> like density, melting point, and stability due to differences in mass.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-c5ce7e9e8ef6c15d4a944910147b5488\" style=\"color:#000060;background-color:#dfc816\"><strong>Radioactive Isotopes<\/strong>:<\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li>Some isotopes are <strong>radioactive<\/strong>, meaning they decay over time and emit radiation. These are called <strong>radioisotopes<\/strong>.<\/li>\n\n\n\n<li>Example: <strong>Uranium-238<\/strong> is a radioactive isotope used in nuclear reactors, while <strong>Carbon-14<\/strong> is used in carbon dating to determine the age of fossils.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-0da1b5ef22dd0f98b1c69c90e91be660\" style=\"color:#000060;background-color:#dfc816\"><strong>Applications of Isotopes<\/strong>:<\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li><strong>Medical<\/strong>: Radioisotopes like <strong>Cobalt-60<\/strong> are used in cancer treatment and diagnostic imaging.<\/li>\n\n\n\n<li><strong>Agriculture<\/strong>: Isotopes are used in tracing nutrient uptake in plants.<\/li>\n\n\n\n<li><strong>Archaeology<\/strong>: <strong>Carbon-14 dating<\/strong> helps determine the age of ancient artifacts.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-765510ca7e9ba0a833d33e39a848840c\" style=\"color:#000060;background-color:#dfc816\"><strong>Stable vs. Unstable Isotopes<\/strong>:<\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li><strong>Stable isotopes<\/strong> do not change over time and do not emit radiation.<\/li>\n\n\n\n<li><strong>Unstable isotopes<\/strong> (radioisotopes) undergo radioactive decay and can transform into other elements.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-8826cff6a4973f2679771034c3b94b58\" style=\"color:#000060;background-color:#dfc816\"><strong>Isotopes in Nature<\/strong>:<\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li>Elements in nature often exist as mixtures of their isotopes. For example, chlorine is a mix of <strong>Chlorine-35<\/strong> and <strong>Chlorine-37<\/strong>.<\/li>\n\n\n\n<li>The <strong>average atomic mass<\/strong> of an element on the periodic table is a weighted average of its naturally occurring isotopes.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-text-align-center has-text-color has-background has-link-color has-large-font-size wp-elements-1bba417feb16baa0e0e8c2fec4009cdc\" style=\"color:#000060;background-color:#dfc816\"><strong>Importance of Isotopes<\/strong>:<\/p>\n\n\n\n<ul class=\"has-large-font-size wp-block-list\">\n<li>Isotopes play a crucial role in scientific research, medicine, environmental studies, and understanding the history of Earth and space.<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-group has-large-font-size\"><div class=\"wp-block-group__inner-container is-layout-constrained wp-block-group-is-layout-constrained\">\n<p class=\"has-text-color\" style=\"color:#d90000\">Let&#8217;s practice!<\/p>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/76019\/966\/290\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-19.png\" alt=\"\" class=\"wp-image-6394\" srcset=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-19.png 500w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-19-300x300.png 300w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-2-19-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/wordwall.net\/play\/76049\/841\/425\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-20.png\" alt=\"\" class=\"wp-image-6395\" srcset=\"https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-20.png 500w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-20-300x300.png 300w, https:\/\/9thclass.deltapublications.in\/wp-content\/uploads\/2023\/03\/Worksheet-1-1-1-20-150x150.png 150w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><\/figure>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Isotopes Key Notes: Definition of Isotopes: Example of Isotopes: Atomic Number and Mass Number: Representation of Isotopes: Physical vs. Chemical Properties: Radioactive Isotopes: Applications of Isotopes: Stable vs. Unstable Isotopes: Isotopes in Nature: Importance of Isotopes: Let&#8217;s practice!<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"class_list":["post-3661","page","type-page","status-publish","hentry","entry"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3661","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/comments?post=3661"}],"version-history":[{"count":21,"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3661\/revisions"}],"predecessor-version":[{"id":16353,"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/pages\/3661\/revisions\/16353"}],"wp:attachment":[{"href":"https:\/\/9thclass.deltapublications.in\/index.php\/wp-json\/wp\/v2\/media?parent=3661"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}