Multiple choice

Which of the following pairs of ‘element/ion - its electronic configuration’ is not correct?

  1. V - 3d34s2

  2. Cu - 3d104s1

  3. Fe2+ - 3d64s0

  4. Mn2+ - 3d74s0

  5. Sc+ - 3d14s1

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Mn2+ has the electronic configuration of 3d54s0. 3d74s0 is the electronic configuration of Co2+.