Question

The electronic configuration which corresponds to a halogen is

• A. 2, 2
• B. 2, 8, 2
• C. 2, 8, 1
• D. 2, 8, 7

Answer 1

The correct option is D

2, 8, 7

Halogens are the elements belonging to group 17.

Explanation for the correct option:

Halogens have 7 electrons in the valence shell.

So, electronic configuration of 2, 8, 7 is halogen.

Explanation for the incorrect option:

Group 2 elements contain 2 electrons in the valence shell.

Electronic configuration of 2, 2 belongs to group 2.

Electronic configuration of 2, 8, 2 belongs to group 2.

Electronic configuration of 2, 8, 1 belongs to group 1.

Final answer:

Hence, option (D) is the correct option.