Atoms and Moleculese

PREFIX OR
SUFFIX

MEANING

EXAMPLE

Mono-

There is 1 atom of that type in that molecule

Carbon monoxide (CO)

Di-

There are 2 atoms of that type in the molecule

Carbon dioxide (CO₂)

Bi-

Hydrogen is present in the molecule

Sodium bicarbonate
(NaHCO₃)

-ide

There are only 2 types of atoms present in the molecule

Lead oxide
(PbO)

-ate

There are 3 or more types of atoms in the molecule, and 1 type is oxygen

Calcium carbonate
(CaCO₃)

1+

2+

3+

1-

2-

3-

H ¹⁺

Mg ²⁺

Al 3+

F ^1-

O ^2-
oxide

PO4 _3-
Phosphate

Na ¹⁺

Ca ²⁺

Fe 3+
ferric

Cl ^1-

S ^2-
sulphide

Li ¹⁺

Cu²⁺

Br^1-

CO3 ^2-
carbonate

K ¹⁺

Zn ²⁺

OH ^1-
hydroxide

SO4 ^2-
sulphate

Ag ¹⁺

Pb ²⁺

NO3 ^1-
Nitrate

NH4 ¹⁺
Ammonium

Fe ²⁺
ferrous

HCO3 ^1-
bicarbonate