Polyatomic Ions and Prefixes

Prefixes

5

pent

10

dec

4

tetra

1

mono

3

tri

6

hex

8

oct

2

di

7

hept

9

non

Polyatomic ions

Phosphate

PO 4 3-

Ammonium

NH 4 +

Nitrite

NO 2 –

Acetate

C2H3O2 –C2H3O2 –

Hydroxide

OH –

Sulfate

SO 4 2-

Phosphite

PO 3 3-

Sulfite

SO 3 2-

Nitrate

NO 3 -

Permanganate

MnO 4 –

Chlorite

Cl0 2 –

Hydronium

H 3 O +

Carbonate

CO 3 2-

Borate

BO 3 3-

Bicarbonate

HCO 3 –

Dichromate

Cr 2 O 7 2-

Cyanide

CN –

Chlorate

ClO 3 –

Peroxide

O 2 2-

Chromate

CrO 4 2-