Question

Q2. Give the formulae of the compounds formed from the following sets of elements:
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Answer 1

Explanation:

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

1. Calcium and fluorine

2. Hydrogen and sulphur

3. Nitrogen and hydrogen

4. Carbon and chlorine

5. Sodium and oxygen

6. Carbon and oxygen.

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Solution

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1. Calcium and fluorine

Symbol Ca F

Charges +2 1−

Formula CaF

2

2. Hydrogen and sulphur

Symbol H S

Charges 1+ 2−

Formula H

2

S

3. Nitrogen and hydrogen

Symbol N H

Charges 3− 1+

Formula NH

3

4. Carbon and chlorine

Symbol C Cl

Charges 4+ 1−

Formula CCl

4

5. Sodium and oxygen

Symbol Na O

Charges 1+ 2−

Formula Na

2

O

6. Carbon and oxygen.

Symbol C O

Charges 4+ 2−

C

2

O

4

i. e.

Formula CO

2