Question

Q14 Give the formulae of the compounds formed from the following sets of elements

(a) Calcium and fluorine

(b) Hydrogen and sulphur

(c) Nitrogen and hydrogen

(d) Carbon and chlorine

(e) Sodium and oxygen

(f) Carbon and oxygen​

Answer 1

Answer:

(a) CaF2

(b) H2S

(c) NH3

(d) CCl4

(e) Na2O

(f) CO2

Answer 2

Answer:

(a) Calcium and fluorine

➜ Symbol Ca F

Charges +2 1 -

Formula CaF2

(b) Hydrogen and sulphur

➜ Symbol H S

Charges 1 + 2 -

Formula H2S

(c) Nitrogen and hydrogen

Symbol N H

Charges 3 - 1 +

Formula NH3

(d) Carbon and chloride

Symbol C CI

Charges 4 + 1 -

Formula CCI4

(e) Sodium and oxygen

Symbol N a O

Charges 1 + 2 -

(f) Carbon and oxygen

Symbol C O

Charges 4 + 2 -

C2O4 e.i.

Formula CO2