{"id":33058,"date":"2025-06-23T05:54:55","date_gmt":"2025-06-23T05:54:55","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=33058"},"modified":"2025-06-23T05:54:58","modified_gmt":"2025-06-23T05:54:58","slug":"an-atom-of-element-be-has-four-protons-four-electrons-and-five-neutrons","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/an-atom-of-element-be-has-four-protons-four-electrons-and-five-neutrons\/","title":{"rendered":"An atom of element Be has four protons, four electrons, and five neutrons."},"content":{"rendered":"\n<p>An atom of element Be has four protons, four electrons, and five neutrons. Which element below could be an isotope of this atom? Sodium-10, beryllium-10, boron-9, carbon-9.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>The correct answer is <strong>beryllium-10<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>An <strong>isotope<\/strong> is defined as an atom of the same element that has the same number of protons but a different number of neutrons. The <strong>atomic number<\/strong> (which is the number of protons) identifies the element, while the <strong>mass number<\/strong> is the sum of protons and neutrons.<\/p>\n\n\n\n<p>Let us analyze the given atom:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The atom has <strong>4 protons<\/strong>, which means it is <strong>beryllium (Be)<\/strong> since the atomic number of beryllium is 4.<\/li>\n\n\n\n<li>It has <strong>4 electrons<\/strong>, which means the atom is electrically neutral.<\/li>\n\n\n\n<li>It has <strong>5 neutrons<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>The <strong>mass number<\/strong> is calculated as:Mass&nbsp;number=Number&nbsp;of&nbsp;protons+Number&nbsp;of&nbsp;neutrons=4+5=9\\text{Mass number} = \\text{Number of protons} + \\text{Number of neutrons} = 4 + 5 = 9Mass&nbsp;number=Number&nbsp;of&nbsp;protons+Number&nbsp;of&nbsp;neutrons=4+5=9<\/p>\n\n\n\n<p>Thus, this atom is <strong>beryllium-9<\/strong>, the most common isotope of beryllium.<\/p>\n\n\n\n<p>Now, let us check the options to find an isotope:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Sodium-10<\/strong>: Sodium has an atomic number of 11, so it has 11 protons. It is a different element, not an isotope of beryllium.<\/li>\n\n\n\n<li><strong>Beryllium-10<\/strong>: This is still beryllium, meaning it has 4 protons but a different number of neutrons. Specifically, beryllium-10 has 6 neutrons. Since isotopes only differ in neutron number, beryllium-10 is an isotope of beryllium-9.<\/li>\n\n\n\n<li><strong>Boron-9<\/strong>: Boron has 5 protons, so it is a different element, not an isotope of beryllium.<\/li>\n\n\n\n<li><strong>Carbon-9<\/strong>: Carbon has 6 protons, so it is a different element, not an isotope of beryllium.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Conclusion:<\/h3>\n\n\n\n<p>Only <strong>beryllium-10<\/strong> has the same number of protons as the given atom but a different mass number due to a different number of neutrons, making it an isotope of the given beryllium atom.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"852\" height=\"1024\" src=\"https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-485.jpeg\" alt=\"\" class=\"wp-image-33059\" srcset=\"https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-485.jpeg 852w, https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-485-250x300.jpeg 250w, https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-485-768x923.jpeg 768w\" sizes=\"auto, (max-width: 852px) 100vw, 852px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>An atom of element Be has four protons, four electrons, and five neutrons. Which element below could be an isotope of this atom? Sodium-10, beryllium-10, boron-9, carbon-9. The Correct Answer and Explanation is: The correct answer is beryllium-10. Explanation: An isotope is defined as an atom of the same element that has the same number [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-33058","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/33058","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=33058"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/33058\/revisions"}],"predecessor-version":[{"id":33060,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/33058\/revisions\/33060"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=33058"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=33058"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=33058"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}