What are the metal oxidation states in #Pb(NO_3)_2# and #NaNO_3#?
Oxidation state is the charge left on the central atom, when all of the bonding pairs of electrons are broken, with the charge assigned to the most electronegative atom. For salts, such sodium nitrate, or lead nitrate, we break up the compound into its constituent ions, which are here easy to see:
And thus here, clearly, we gots
We can go farther than this, and drill down to the oxidation states of nitrogen, and oxygen in the nitrate ion; and oxygen is still marginally more electronegative than nitrogen. As always, the sum of the oxidation numbers is equal to the charge on the ion, here
What are the nitrogen oxidation numbers in