Which has more atoms: 3.0 g of iron, or 2.0 g of sulfur?
You must calculate the molar quantity of each element. Moles relate to the number of species. If there are 1 mole of particles, there are
Moles of iron,
Moles of sulfur,
I leave it to you to do these calculation and get an answer in moles. It looks pretty clear that there are more sulfur atoms.