{"id":195041,"date":"2025-02-25T11:42:13","date_gmt":"2025-02-25T11:42:13","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=195041"},"modified":"2025-02-25T11:42:16","modified_gmt":"2025-02-25T11:42:16","slug":"tungsten-is-a-rare-metal-found-naturally-on-earth-almost-exclusively-combined-with-other-elements-in-chemical-compounds-as-opposed-to-on-its-own","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/02\/25\/tungsten-is-a-rare-metal-found-naturally-on-earth-almost-exclusively-combined-with-other-elements-in-chemical-compounds-as-opposed-to-on-its-own\/","title":{"rendered":"Tungsten is a rare metal found naturally on earth almost exclusively combined with other elements in chemical compounds as opposed to on its own"},"content":{"rendered":"\n<p>Tungsten is a rare metal found naturally on earth almost exclusively combined with other elements in chemical compounds as opposed to on its own. Tungsten alloys have many applications including X-ray tubes, light bulb filaments and radiation shielding. The four most abundant isotopes of tungsten are: 180W, 182W, 183W, and 184W. Determine the number of protons, electrons and neutrons in each isotope. If a neutron has a mass of 1.67 x 10-27 kg, what is the total mass of neutrons (in grams) in Tungsten<\/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<h3 class=\"wp-block-heading\">Number of Protons, Electrons, and Neutrons in Tungsten Isotopes:<\/h3>\n\n\n\n<p>Tungsten (W) has an atomic number of <strong>74<\/strong>, meaning every isotope of tungsten has:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>74 protons<\/strong> (since the number of protons defines the element)<\/li>\n\n\n\n<li><strong>74 electrons<\/strong> (since atoms are electrically neutral)<\/li>\n<\/ul>\n\n\n\n<p>The number of neutrons varies depending on the isotope. The number of neutrons is determined using:<\/p>\n\n\n\n<p>[<br>\\text{Neutrons} = \\text{Mass Number} &#8211; \\text{Protons}<br>]<\/p>\n\n\n\n<p>For each isotope:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>( ^{180}W )<\/strong>: ( 180 &#8211; 74 = 106 ) neutrons<\/li>\n\n\n\n<li><strong>( ^{182}W )<\/strong>: ( 182 &#8211; 74 = 108 ) neutrons<\/li>\n\n\n\n<li><strong>( ^{183}W )<\/strong>: ( 183 &#8211; 74 = 109 ) neutrons<\/li>\n\n\n\n<li><strong>( ^{184}W )<\/strong>: ( 184 &#8211; 74 = 110 ) neutrons<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Total Mass of Neutrons in Tungsten:<\/h3>\n\n\n\n<p>A single neutron has a mass of ( 1.67 \\times 10^{-27} ) kg. Converting to grams:<\/p>\n\n\n\n<p>[<br>1.67 \\times 10^{-27} \\times 10^{3} = 1.67 \\times 10^{-24} \\text{ g}<br>]<\/p>\n\n\n\n<p>To find the total mass of neutrons in <strong>one mole<\/strong> of tungsten, we need the weighted average number of neutrons per tungsten atom. The natural abundances of these isotopes are approximately:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>( ^{180}W ) = <strong>0.12%<\/strong><\/li>\n\n\n\n<li>( ^{182}W ) = <strong>26.50%<\/strong><\/li>\n\n\n\n<li>( ^{183}W ) = <strong>14.30%<\/strong><\/li>\n\n\n\n<li>( ^{184}W ) = <strong>30.64%<\/strong><\/li>\n\n\n\n<li>( ^{186}W ) = <strong>28.43%<\/strong> (excluded since it&#8217;s not part of the four mentioned)<\/li>\n<\/ul>\n\n\n\n<p>Using a weighted average:<\/p>\n\n\n\n<p>[<br>\\text{Avg. neutrons} = (106 \\times 0.0012) + (108 \\times 0.265) + (109 \\times 0.143) + (110 \\times 0.3064)<br>]<\/p>\n\n\n\n<p>[<br>= 0.1272 + 28.62 + 15.587 + 33.704<br>]<\/p>\n\n\n\n<p>[<br>\\approx 107.9 \\text{ neutrons per atom}<br>]<\/p>\n\n\n\n<p>Total neutron mass per mole (using Avogadro\u2019s number, ( 6.022 \\times 10^{23} )):<\/p>\n\n\n\n<p>[<br>(107.9) \\times (1.67 \\times 10^{-24} \\text{ g}) \\times (6.022 \\times 10^{23})<br>]<\/p>\n\n\n\n<p>[<br>= 1.09 \\times 10^2 \\text{ g}<br>]<\/p>\n\n\n\n<p>So, the <strong>total neutron mass in one mole of tungsten is approximately 109 g<\/strong>.<\/p>\n\n\n\n<p>Now, let me generate the image.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/02\/image-1516.png\" alt=\"\" class=\"wp-image-195042\"\/><\/figure>\n\n\n\n<p>Here is the scientific infographic illustrating the four most abundant isotopes of tungsten, their atomic structures, and neutron mass calculations. Let me know if you need any modifications!<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tungsten is a rare metal found naturally on earth almost exclusively combined with other elements in chemical compounds as opposed to on its own. Tungsten alloys have many applications including X-ray tubes, light bulb filaments and radiation shielding. The four most abundant isotopes of tungsten are: 180W, 182W, 183W, and 184W. Determine the number of [&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-195041","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/195041","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=195041"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/195041\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=195041"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=195041"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=195041"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}