What is the ground state electron configuration for Cr^3+?

When it's + does mean it loses or gains electrons?

Cr has 24 electrons but does it become 27 because of the +3?

Question

What is the ground state electron configuration for Cr^3+?

When it's + does mean it loses or gains electrons?

Cr has 24 electrons but does it become 27 because of the +3?

abb0t · Answer

You're looking at electrons, not protons. $Cr$ has 6 electrons in it's valence shell. Remember that the "s" sub-shell electrons are lost first.

abb0t · Answer

http://ptable.com/

anonymous · Answer

1s2  2s2  2p6 3s2  3p6 4s2  3d10 4p6 5s2  4d10 5p6 6s2  4f14 5d10 6p6 7s2  5f14 6d107p6  6f14 7d10  7f14 

so I have this... apparently I add until i get 21 which stops at  3d^10 so the answer is [AR] 3d^3