Question

i )
Amongnt A, D and G, which in not electropositive and why"



ii)Atomic size of H is

bigger than B. Why

iii) Write the formula of compound formed by the element E and fluorine .​

Answer 1

Explanation:

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

Answer 2

ANSWER:

1. G is not electronegative in nature as down the group, metallic characters increases so we know that metals are electronegative in the nature.

2.The atomic size of H is bigger than B because down the group as new shell added so, H is larger.

3. The formula:

                        E3F2