Chemical Formulae

......... is a set of atoms attached to each other that act like a single element.

• Metal

• Non metal

• Polyatomic ion

• Transition metal

( OH- ) :

• Hydroxide

• Bicarbonate

• Carbonate

• Nitrate

HCO3 -

• Carbonate

• Bicarbonate

• Ammonium

• Nitrate

NH4+ :

• Carbonate

• Ammonium

• Bicarbonate

• Phosphate

Phosphate is :

• PO4-3

• SO4-2

• OH-

• HCO3-

Nitrate is :

• NO3-

• NO2-

• NO

• NO3+

Sulphate is :

• SO4+

• SO4+2

• SO4-2

• SO4-

How many atoms does H2O have ?

• 1

• 2

• 3

• 4

What's the valency for Hydroxide ?

• 1

• 2

• 3

• 4

What's the valency for Phosphate ?

• 1

• 2

• 3

• 4