1-16 Interpret symbols and formulas of ions

1-16-1. How many protons and electrons are in a magnesium ion (Mg²⁺)?
A. 10, 12, B. 12, 10, C. 24, 22, D. 22, 24

1-16-2. How many protons and electrons are in a nitride ion (N^3-)?
A. 7, 10, B. 7, 4, C. 10, 7, D. 4, 7