1. Fe2O3-Fe(+3); O(-2)
CO-C(+2);O(-2)
FeCl3-Fe(+3);Cl(-1)
Cu2O-Cu(+1);O(-2)
H2S-H(+1);S(-2)
BaBr2-Ba(+2);Br(-1)
SO2-S(+4);O(-2)
AlF3-Al(+3);F(-1)
2.Li2O
H2S
N2O
1. Fe2O3-Fe(+3); O(-2)
CO-C(+2);O(-2)
FeCl3-Fe(+3);Cl(-1)
Cu2O-Cu(+1);O(-2)
H2S-H(+1);S(-2)
BaBr2-Ba(+2);Br(-1)
SO2-S(+4);O(-2)
AlF3-Al(+3);F(-1)
2.Li2O
H2S
N2O