Określ wartościwość metali i niemetali w podanych związkach.
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H2 S, Al2O3 PbO2 HCI Ag2O Cl2O7
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1) H +I S-II
2)Al +III O -II
3) Pb +IV O -II
4) H +I Cl -I
5) Ag +I O -II
6) cl + VII O -II
H2S=H-I,S-II
Al2O3-Al-III, O-II
PbO2-Pb-IV,O-II
HCl-H-I,Cl-I
Ag2O-Ag-I,O-II
Cl2O7-Cl-VII,O-II