Match the atomic number 2, 4, 8, 15, and 19

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. Z = 15
2. Z = 19
3. Z = 8
4. Z = 4
5. Z = 2

• Exam Year: 2017