An oxide ion has a charge of 2-.
Oxide ions have a charge of -2.
The oxides of phosphorus are covalent. There are no ionic charges.
NOT +2Added:In Cu2O the ion charge is Cu1+, (cuprous oxide, Cu(I) oxide, oxidation state +1) color brownish red (or yellow, depending on how fine the particles are) In CuO the ion charge is Cu2+, (cuprous oxide, Cu(II) oxide, oxidation state +2) color black
Uranium valences: 3,4,5,6,7, possible also 2 in the unstable oxide UO.
Uranium valences: 3,4,5,6,7, possible also 2 in the unstable oxide UO.
Lithium oxide is an ionic lattice.
Beryllium oxide, BeO, not ionic
+1
+2
The charge of aluiminum is 3+ and the charge of oxygen is 2-.
Calcium oxide is an ionic compound.
Silver oxide is an ionic compond because the bond is ionic.