{"id":88673,"date":"2025-06-01T07:18:00","date_gmt":"2025-06-01T07:18:00","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=88673"},"modified":"2025-06-01T07:18:00","modified_gmt":"2025-06-01T07:18:00","slug":"atomic-mass-of-an-element-is-equal-to-the-sum-of-number-of","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/atomic-mass-of-an-element-is-equal-to-the-sum-of-number-of\/","title":{"rendered":"Atomic mass of an element is equal to the sum of number of"},"content":{"rendered":"

Atomic mass of an element is equal to the sum of number of<\/p>\n

[amp_mcq option1=”electrons and protons only” option2=”protons and neutrons only” option3=”electrons and neutrons only” option4=”electrons, protons and neutrons” correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-2 – 2020<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is (B) protons and neutrons only. The atomic mass of an element (more accurately, the mass number of a specific isotope or the relative atomic mass) is primarily determined by the mass of the particles in the nucleus. Protons and neutrons are located in the nucleus and account for almost all of an atom’s mass. The mass of electrons is negligible in comparison.
\n<\/section>\n
\nThe nucleus of an atom contains protons and neutrons, which contribute significantly to its mass. Electrons have very little mass.
\n<\/section>\n
\nThe Mass Number (A) of an isotope is the sum of the number of protons (Z) and neutrons (N) in its nucleus (A = Z + N). The atomic mass listed on the periodic table for an element is the weighted average of the masses of its naturally occurring isotopes, taking into account their relative abundances.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Atomic mass of an element is equal to the sum of number of [amp_mcq option1=”electrons and protons only” option2=”protons and neutrons only” option3=”electrons and neutrons only” option4=”electrons, protons and neutrons” correct=”option2″] This question was previously asked in UPSC NDA-2 – 2020 Download PDFAttempt Online The correct answer is (B) protons and neutrons only. The atomic … <\/p>\n

Detailed SolutionAtomic mass of an element is equal to the sum of number of<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1094],"tags":[1288,1162,1096],"class_list":["post-88673","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-2","tag-1288","tag-atomic-structure","tag-chemistry","no-featured-image-padding"],"yoast_head":"\nAtomic mass of an element is equal to the sum of number of<\/title>\n<meta name=\"description\" content=\"The correct answer is (B) protons and neutrons only. The atomic mass of an element (more accurately, the mass number of a specific isotope or the relative atomic mass) is primarily determined by the mass of the particles in the nucleus. Protons and neutrons are located in the nucleus and account for almost all of an atom's mass. The mass of electrons is negligible in comparison. The nucleus of an atom contains protons and neutrons, which contribute significantly to its mass. Electrons have very little mass.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/atomic-mass-of-an-element-is-equal-to-the-sum-of-number-of\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Atomic mass of an element is equal to the sum of number of\" \/>\n<meta property=\"og:description\" content=\"The correct answer is (B) protons and neutrons only. The atomic mass of an element (more accurately, the mass number of a specific isotope or the relative atomic mass) is primarily determined by the mass of the particles in the nucleus. Protons and neutrons are located in the nucleus and account for almost all of an atom's mass. The mass of electrons is negligible in comparison. The nucleus of an atom contains protons and neutrons, which contribute significantly to its mass. Electrons have very little mass.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/atomic-mass-of-an-element-is-equal-to-the-sum-of-number-of\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T07:18:00+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Atomic mass of an element is equal to the sum of number of","description":"The correct answer is (B) protons and neutrons only. 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The atomic mass of an element (more accurately, the mass number of a specific isotope or the relative atomic mass) is primarily determined by the mass of the particles in the nucleus. Protons and neutrons are located in the nucleus and account for almost all of an atom's mass. The mass of electrons is negligible in comparison. The nucleus of an atom contains protons and neutrons, which contribute significantly to its mass. 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The atomic mass of an element (more accurately, the mass number of a specific isotope or the relative atomic mass) is primarily determined by the mass of the particles in the nucleus. Protons and neutrons are located in the nucleus and account for almost all of an atom's mass. The mass of electrons is negligible in comparison. The nucleus of an atom contains protons and neutrons, which contribute significantly to its mass. 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