Question

If an atom has 34 protons and 40 neutrons, what is its mass number?


74

40

6

34

Answer 1

The mass number of an atom is the total number of protons and neutrons in the nucleus. In this case, the atom has 34 protons and 40 neutrons, so the mass number is:

34 protons + 40 neutrons = 74

Therefore, the mass number of the atom is 74.