Question

срочно!!!
визначити валентність Al2O3,PH3,P2O5,NO2,N2O3,CuO,CU2O​

Answer 1

Al2O3 --- Al(III) , O(II)

PH3 --- P(III) , H(I)

P2O5 --- P(V) , O(II)

NO2 --- N(IV) , O(II)

N2O3 --- N(III) , O(II)

CuO --- Cu(II) , O(II)

Cu2O​ --- Cu(I) , O(II)