Question

How do you write the noble-gas electron configuration for nickel?

Answer 1

`[Ar] 4s^2 3d^8`

Explanation:

Have a look at the periodic table...and look for the noble-gas that precedes Ni and note it:
`[Ar]`

Now list the electrons that come after Argon upto Nickel:
`[Ar] 4s^2 3d^8`