Sulfur (S): -2 in S, 0 in SNitrogen (N): -3 in NHAluminum (Al): +3 in Al2OMagnesium (Mg): +2 in MgSO4
Sulfur (S): -2 in S, 0 in S
Nitrogen (N): -3 in NH
Aluminum (Al): +3 in Al2O
Magnesium (Mg): +2 in MgSO4