Explain, in terms of subatomic particles, the difference

Question

between S-32 and S-34

Answer 1

S-32 has 16 electrons, 16 protons, 16 neutrons.
S-34 has 16 electrons, 16 protons, 18 neutrons.
For neutral atoms, #protons = #electrons.
mass number (in this case either the 32 or 34) = #protons + #neutrons.

Answer 2

The mass of S-34 is greater than the mass of S-32