Ag(+2)O(-2)
P2(+5)O5(-2)
C(-4)H4(+1)
Cl2(+7)O7(-2)
Hg2(+1)O(-2)
Cr2(+3)O3(-2)
Pb(+4)O2(-2)
N2(0)
O2(0)
Mn2(+7)O7(-2)
Ba(+2)N(+5)O3(-2)
S(0)
F(0)
S(+4)O2(-2)
H3(+1)P(+5)O4(-2)
Al(+3)(O(-2)H(+1))3
2. H2 + S = H2S
H2 + 2 Na = 2 NaH
H2 + 2 Br = 2 HBr
H2 + 2 Ba = 2 BaH