SO3. S-6, O-2Na2S. Na- 1, S-2NH3. N-3, H-1Al2Se3. Al- 3, Se-2V2O5. V- 5, O-2SnO2. Sn- 4, O-2CuS. Cu-2, S-2
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SO3. S-6, O-2
Na2S. Na- 1, S-2
NH3. N-3, H-1
Al2Se3. Al- 3, Se-2
V2O5. V- 5, O-2
SnO2. Sn- 4, O-2
CuS. Cu-2, S-2