Question

Read the statement and answer the following question:

Match the atomic numbers A=4, B= 14, C= 8, D= 15 and E=19 with each of the following:

State (i) solid non-metal of valency 3

(ii) a gas of valency 2

(iii) metal of valency 1

(iv) non-metal of valency 4

(v) Formula of compound between A and D
please answer its urgent​

Answer 1

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1. D
2. C
3. E
4. B
5. $A_{3}D_{2}$

Valencies

1. A-4---2,2------ +2
2. B-14--2,8,4------ 4
3. C-8---2,6----- -2
4. D-15--2,8,5------ -3
5. E-19--2,8,8,1------+1