67th B.P.S.C. (Pre) 2021
The mass number of a nucleus is -
aThe sum of the numbers of neutrons and protons✓ Correct
bThe total mass of neutrons and protons
cAlways greater than the atomic mass
dAlways less than its atomic number
eNone of the above / More than one of the above
Explanation
See the explanation of the above question.
general-science