What is the electron configuration of an isolated Fe atom (no ligands bound to it)?

Question

(Use notation like [Ne]3s^23p^6 for your answer)

B. What is the electron configuration of an isolated Fe3+ cation?
(Use notation like [Ne]3s^23p^6 for your answer)

Answer 1

[Ar]3d^8 and [Ar]3d^5