Question

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

• A. 19: A metal of valency one.
• B. 15: A solid non-metal of period 3
• C. 8: A rare gas
• D. 2: A gaseous element with valency 2.
• E. 4: An element of group 2.

Answer 1

Answer: (A), (B), (E)

The correct options are
A 19: A metal of valency one.
B 15: A solid non-metal of period 3
E 4: An element of group 2.