Nuclear basics: What does the mass number of a nucleus represent? Interpret the definition in terms of subatomic particles inside the nucleus. Choose the correct description.
IIT JEE
Chemistry
Difficulty: Easy
Choose an option
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ANumber of protons only
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BNumber of neutrons only
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CTotal number of nucleons (protons + neutrons)
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DNumber of electrons in neutral atom
Answer
Correct Answer: Total number of nucleons (protons + neutrons)
Explanation
Concept
Mass number A = Z (protons) + N (neutrons). Electrons are not counted in A.Final AnswerTotal number of nucleons (protons + neutrons).