Oxidation state Sn (So4) 2 Na3SbO3 BiCl3 K2ZnO2 PH3.

Oxidation states of elements in substances:
1) Sn (So4) 2: Sn (+4), S (+6), O (-2);
2) Na3SbO3: Sb (+3), Na (+1), O (-2);
3) BiCl3: Bi (+3), Cl (-1);
4) K2ZnO2: Zn (+2), K (+1);
5) PH3: P (-3), H (+1).
Oxidation states are written above each element.

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