Question

How many CHARGED nuclear, and electronic particles are present in `"potassium nitride"`?

Answer 1

In potassium nitride I count `"64 protons"` and `"64 electrons"`.

Explanation:

This is a neutral salt, and as such there must be equality between electrons, and nuclear protons. Nitrogen has an atomic number, `Z=7`. Potassium has an atomic number, `Z=19`.

So there are `7+3xx19=64*"protons"`; and there must be an equal number of electrons in the neutral salt: `3xx18+10=64*"electrons"`. All I am doing is using the atomic numbers of potassium and nitrogen to tell me how many protons there are, and how many electrons there must be in the ions `K^+` and `N^(3-)`.