Question

1. mg + n→ __ mg^{+2}n^{-3}

3 mg + 2 n→ 1 mg_{3}n_{2}

Explanation:

Step1: Balance Mg atoms

On the right - hand side, there are 3 Mg atoms in \(Mg_3N_2\). So, we put a coefficient of 3 in front of Mg on the left - hand side: \(3Mg+N
ightarrow Mg_3N_2\).

Step2: Balance N atoms

On the right - hand side, there are 2 N atoms in \(Mg_3N_2\). So, we put a coefficient of 2 in front of N on the left - hand side: \(3Mg + 2N
ightarrow Mg_3N_2\).

Step3: Check the formula

The formula \(Mg_3N_2\) is correct as the charges balance: \(3\times(+ 2)+2\times(-3)=6 - 6 = 0\).

Answer:

\(3Mg+2N
ightarrow1Mg_3N_2\)