Question

Match the atomic number 2, 4, 8, 15 and 19 with each of the following

1) A solid non metal belonging to the third period.

2) A metal of valency 1.

3) A gaseous element with valency 2.

4) An element belonging to Group 2

5) A rare gas.

Answer 1

	Atomic number
A solid non-metal belonging to the third period	15
A metal of valency 1	19
A gaseous element with valency 2	8
An element belonging to Group 2.	4
A rare gas	2