chemistry
posted by kelly .
Determine the oxidation state for the SECOND element in each of the following:
NaF _____
Could you give me the steps to determine the answer

The sum of the oxidation states is zero.
Na is +1, so F must be 1 
so what wouldit be for Mg3P2? if it has a subscript?

Mg is +2, so three of them make a +6.
This has to be offset by 2P ions, so each P is 3