Question

20. Match the atomic number 19, 15, 8, 4 and 2 with each
of the following:
(0) A metal of valency one.
(1) A solid non-metal of period 3.
(HD) A rare gas
(iv) A gaseous element with valency 2.
(v) An element of group 2.​

Answer 1

Answer:

1)  19

2) 15

3)2

4)  8

5) 4

Explanation:

Answer 2

Answers:

(0) A metal of valency one:- 19

(1) A solid non-metal of period 3:- 15

(HD) A rare gas:- 2

(iv) A gaseous element with valency 2:- 8

(v) An element of group 2:- 4

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