Answer:
Yes. The mass number of an atom is the total number of protons and neutrons in its nucleus. Atoms of different elements usually have different mass numbers, but they can be the same.
Explanation:
The number of protons in the nucleus of the atom is equal to the atomic number. The number of electrons in a neutral atom is equal to the number of protons. The number of neutrons is equal to the difference between the mass number of the atom and the atomic number.
