The correct formula for magnesium nitrate?

Question 12 options:

MgNO3

Mg2NO3

Mg (NO3) 2

Mg2 (NO3) 2

Mg (NO3) 2

Mg is + 2 in oxidation while NO3 is - 1, so you require two NO3 to have a neutral charge: 0

Mg (NO3) 2

Explanation:

Look at the charges of the cation and anion. Mg has a + 2 charge while NO3 has a - 1 charge. You'll need 2 NO3 molecules to cancel the charge of Mg for a neutral compound. This is how they should be balanced unless they give a total charge in the question.