Question

A nitride ion has 7 protons, 8 neutrons, and 10 electrons. What is the overall charge on this ion?

Answer 1

-3 as it has 3 more electrons than protons giving it a negative charge :)

Answer 2

Answer: The overall charge on this ion is -3.

Solution:

Protons : These are the subatomic species which carries positive charge.

Electrons: These are the subatomic species which carries negative charge.

Neutrons: These are the subatomic species which doesn't carry any charge.

The net charge on the ion will be = (number protons)$\times$(charge carried by the protons.) + (total number of electrons)$\times$(charge carried by the electrons)

Numbers of proton = 7

Numbers of electrons = 10

So, net charge on the nitride ion = $7\times (+1)+10\times (-1)= -3$