Question

What is the electronic configration of nickel

Answer 1

Atomic number = 28
Symbol = Ni

Answer 2

Nickel has the atomic number 28, so the electronic configuration will be
[Ar]  $3d^{8}$ $4s^{2}$ (with Argon being the nearest noble gas configuration).

The full electronic configuration is:
$1s^{2}$   $2s^{2}$ $2p^{6}$    $3s^{2}$ $3p^{6}$   $4s^{2}$    $3d^{8}$