?

General Chemistry

Free Version

Upgrade subject to access all content

Moderate

Electronic Configuration of Ions

CHEM-NU34LG

An element’s atomic number is smaller than that of Kr’s. After a neutral atom of this element loses 3 electrons, its subshell with the angular momentum number of 2 is half-filled.

What is this element?

A

Fe

B

Ru

C

C

D

Ar