# What are the numbers of the subatomic particles in tin?

I choose the most abundant isotope, ""^120Sn ; note that tin has many isotopes.
Now all tin isotopes have 50 nuclear protons, and 50 electrons; we know this from the atomic number of $S n ,$ $Z = 50$.
""^120Sn has 70 neutrons, 70 massive, neutrally charged nuclear particles. It is approx. 30% abundant.