Answer:
There needs to be 2 Na atoms and 1 O atom to form Na2O.
Explanation:
If you go to see the periodic table to review the oxidation states of elements, you can see that Na only has +1 as oxidation state, and O only has -2 as oxidation state.
The algebraic sum of these oxidation states in a neutral compound (not ions) must be zero, so let's apply the following technique to form the compound:
So the compound would be Na2O, so we need 2 atoms of Na, and 1 atom of O.
The answer would be: There needs to be 2 Na atoms and 1 O atom to form Na2O.
