H⁺¹2S⁻², Fe⁺²S⁻², Al⁺³i⁻³, Al⁺³2S⁻²3, Ca⁺²3P⁻³2, Na⁺H⁻, Li⁺N⁻, S°, F°2, H⁺Br⁻, N⁺³H⁻¹3, P⁺³H⁻¹3.

H2S 
H+1. S -2
FeS 
Fe+2. S-2
AlI
Al +3. I -1
Al2S3
Al +3
S -2
Ca3P2
Ca+2
P -3
NaH
Na -1
H+1
LiNe
Li+1
Ne -1
F4 -4
HBr
H+1
Br -1
NH3
N-3
H +1
PH3
P -3
H +