Chemical Formula

A

1

NaH

1 x Sodium

1 x Hydrogen

2

MgO

1 x magnesium

1 x oxygen

3

NaOH

1 x sodium

1 x oxygen

1 x hydrogen

4

Be₃N₂

3 x beryllium

2 x nitrogen

5

Cs₂O

2 x Caesium

1 x oxygen

B

1

CaCO₃

1 x calcium

1 x carbon

3 x oxygen

2

CCl₄

1 x carbon

4 x chlorine

3

K₃P

3 x potassium

1 x phosphorus 

4

NH₄Cl

1 x nitrogen

4 x hydrogen

1 x chlorine

5

Al(OH)₃

1 x aluminium

3 x oxygen

3 x hydrogen

C

1

H₂O

2 x hydrogen

1 x oxygen

2

N₃P₅

3 x nitrogen

5 x phosphorus 

3

Li₂S

2 x Lithium

1 x sulphur 

4

SiO₂

1 x silicone

2 x oxygen

5

Mg(NO₃)₂

1 x magnesium

2 x nitrogen

6 x oxygen

D

1

CH₄ 

1 x carbon

4 x hydrogen

2

HCl

1 x hydrogen

1 x chlorine

3

BaO

1 x barium

1 x oxygen

4

NO₂

1 x nitrogen

2 x oxygen

5

Ca₃(PO₄)₂

3 x calcium

2 x phosphorus 

8 x oxygen

E

1

CO₂

1 x carbon

2 x oxygen

2

Zn₃N

3 x zinc

1 x nitrogen

3

SnO₂

1 x tin

2 x oxygen

4

H₂SO₄

2 x hydrogen

1 x sulphur

4 x oxygen

5

PbO₂

1 x lead

2 x oxygen