What is the correct electron configuration for V^2+?

Question

I'm studying for a placement exam for Chemistry and I just want to make sure that I understand how to get this answer. I have an idea. Explanation will be great, thanks.

Answer 1

In shorthand, the electron configuration for V is [Ar]4s²3d³ . However, when electrons are removed - I know it's weird - the s-electrons come off first. So V²⁺ would be [Ar]3d³ . Maybe it's to do with the shielding effects of the inner 3d, making it easier to remove the outer 4s.....