1. Al2O3, NO2, SO3, K2O.
2. а) PbO - Pb(II), O(II);
PbO2 - Pb(IV), O(II);
P2O3 - P(III), O(II);
SiO2 - Si(IV), O(II);
б) HBr - H(I), Br(I);
H2S - H(I), S(II);
PH3 - P(III), H(I);
SiH4 - Si(IV), H(I).
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Answers & Comments
1. Al2O3, NO2, SO3, K2O.
2. а) PbO - Pb(II), O(II);
PbO2 - Pb(IV), O(II);
P2O3 - P(III), O(II);
SiO2 - Si(IV), O(II);
б) HBr - H(I), Br(I);
H2S - H(I), S(II);
PH3 - P(III), H(I);
SiH4 - Si(IV), H(I).