Question

The elements A, B, C, D and E have atomic number 9, 11, 13, 12 and 17 respectively. Which pair of elements belong to the same group?

1 point

(a)A and B

(b) B and D

(c) A and C

(d) A and E


​

Answer 1

The answer is Option D as element A is Fluorine and element E is Chlorine.

Prefer you to learn Periodic table