Question

What is the ground-state electron configuration of a neutral atom of manganese?

Answer 1

Well, what is the atomic number of manganese....?

Explanation:

A quick glance at the Periodic Table tells me `Z=25`....and we merely follow the `"aufbau principle....."`

`Mn, Z=25`, `1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)3d^(5)`....

And we could abbreviate this to....`[Ar]4s^(2)3d^5`.... Agree?