Identify the atom with the following ground-state electron configuration for its valence shell.

4d^2 3d^10

Please give the symbol of the element!
I answered Ar, but I was wrong :(

I'm assuming you meant 4s^2 3d^10

The element is Zn (Zinc).

edit: the full configuration starts from 1s^2, hopefully you know that. or if you are writing the noble gas configuration, it would be [Ar]4s^2 3d^10