Write the ground-state electron configuration of Fe 3+ .
A)[Ar]3d 5 4s 2
B)[Ar]3d 3 4s 2
C)[Ar]3d 3 4s 0
D)[Ar]3d 6 4s 1
E)[Ar]3d 3 4s 3

Question

Write the ground-state electron configuration of Fe 3+ .
A)[Ar]3d 5 4s 2 
B)[Ar]3d 3 4s 2 
C)[Ar]3d 3 4s 0 
D)[Ar]3d 6 4s 1 
E)[Ar]3d 3 4s 3

Quizplus · Accepted Answer

Fe^{3+ indicates that Fe has lost 1 electron, so we remove one electron from the highest energy level (4s).} indicates that sulfur has two electrons in the 3p sublevel and one electron in the 3s sublevel. Putting this all together, the ground-state electron configuration for Fe³⁺ is: [Ar] 3d10 4s2 4p3 for Fe and [Ne] 3s2 3p4 for S. Option B is the only choice that reflects this configuration.

Write the Ground-State Electron Configuration of Fe3+

Write the Ground-State Electron Configuration of Fe³⁺