Decide which of the following electron configurations is correct for the species given.

Question

Co3+, [Ar]3d6

Ti+, [Ar]4s23d1

Cr3+, [Ar]3d3

Cu+, [Ar]3d10

V, [Ar]4s23d3

Fe3+, [Ar]3d5

Answer 1

Looks like Ti+ is wrong and the others are right. What is your problem in doing this? You should learn how to do it. There are some mnemonics to help. I use one called "the Dr Bob rule". I'll be glad to share it with you if you wish.