Question

What is the outer electron configuration for the group 15 element in the fourth period?

Answer 1

`[Ar]3d^10 4s^2 4p^3`

Explanation:

Elements of group 15 from top to bottom are:-

• Nitrogen
• Phosphorous
• Arsenic
• Antimony
• Bismuth

Since Nitrogen belongs to 2nd period, 4th period element from 15th group is Arsenic with outer electronic configuration as `[Ar]3d^10 4s^2 4p^3`