How many protons and electrons do the following ion have? a)n-3 (atomic number=7) explain how to do it?

a) Number of protons = number of electron in the atom = atomic number

So it has 7 protons answer

N-3 has gained 3 electron so number of electrons + 7+3

= 10 answer

a electronegativity decreases beacuse the size of nucleus is bigger.