# If a sulfur atom has 16 protons, 16 electrons, and 16 neutrons, what is its atomic mass?

The sulfur atom has a mass of $32 \cdot \text{amu}$.
Of course we can ignore the electron mass, but if there are 16 neutrons, and 16 protons we have the ""^32S isotope, which is approx. 95% abundant.