IIIA/13
IVA/14
VA/15
VIA/16
VIIA/17
Nitr
ite
N
O
2
1-
Phosph
ite
P
O
3
3-
Sulf
ite
S
O
3
2-
Chlor
ite
Cl
O
2
1-
Arsen
ite
As
O
3
3-
Selen
ite
Se
O
3
2-
Brom
ite
Br
O
2
1-
Iod
ite
I
O
2
1-