{"id":87359,"date":"2025-06-01T06:41:38","date_gmt":"2025-06-01T06:41:38","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87359"},"modified":"2025-06-01T06:41:38","modified_gmt":"2025-06-01T06:41:38","slug":"an-atom-of-carbon-has-6-protons-its-mass-number-is-12-how-many-neutr","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/an-atom-of-carbon-has-6-protons-its-mass-number-is-12-how-many-neutr\/","title":{"rendered":"An atom of carbon has 6 protons. Its mass number is 12. How many neutr"},"content":{"rendered":"

An atom of carbon has 6 protons. Its mass number is 12. How many neutrons are present in an atom of carbon?<\/p>\n

[amp_mcq option1=”12″ option2=”6″ option3=”10″ option4=”14″ correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-1 – 2016<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is B) 6.
\n<\/section>\n
\nThe mass number (A) of an atom is the total number of protons and neutrons in the nucleus. The number of protons is equal to the atomic number (Z). Therefore, the number of neutrons (N) can be calculated using the formula: N = A – Z.
\n<\/section>\n
\nFor the given carbon atom:
\nNumber of protons (Z) = 6
\nMass number (A) = 12
\nNumber of neutrons (N) = Mass number (A) – Number of protons (Z) = 12 – 6 = 6.
\nThus, there are 6 neutrons in an atom of carbon with mass number 12. This specific isotope is Carbon-12 (\u00b9\u00b2C), the most common isotope of carbon.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

An atom of carbon has 6 protons. Its mass number is 12. How many neutrons are present in an atom of carbon? [amp_mcq option1=”12″ option2=”6″ option3=”10″ option4=”14″ correct=”option2″] This question was previously asked in UPSC NDA-1 – 2016 Download PDFAttempt Online The correct answer is B) 6. The mass number (A) of an atom is … <\/p>\n

Detailed SolutionAn atom of carbon has 6 protons. Its mass number is 12. How many neutr<\/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":[1093],"tags":[1098,1162,1096],"class_list":["post-87359","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1098","tag-atomic-structure","tag-chemistry","no-featured-image-padding"],"yoast_head":"\nAn atom of carbon has 6 protons. Its mass number is 12. How many neutr<\/title>\n<meta name=\"description\" content=\"The correct answer is B) 6. The mass number (A) of an atom is the total number of protons and neutrons in the nucleus. The number of protons is equal to the atomic number (Z). 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