A) number of protons + number of neutrons + number of electrons
B) number of protons + number of neutrons
C) number of protons + number of electrons
D) number of electrons + number of neutrons
Correct Answer: B
Solution :
Mass number of an atom is the sum of nucleons, i.e., the sum of number of protons and that of neutrons.You need to login to perform this action.
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