Why do electrons enter the 4s orbital before entering the 3d orbital?

A. Because the 3d orbital is at a lower energy level
B. Because both the 4s and 3d orbitals are at the same energy level
C. Because the 4s orbital is at a lower energy level
D. Because the 4s orbital is at a higher energy level

The 4s orbital has a lower energy because it is more penetrating than a 3d orbital. A 4s electron can get closer the nucleus than a 3d electron, so it has a lower potential energy.

The other options are incorrect because they contradict the correct one.

Why do electrons enter the 4s orbital before entering the 3d orbital?A. Because the 3d orbital is at a lower energy level B. Because both the 4s and 3d orbitals are at the same energy level C. Because the 4s orbital is at a lower energy level D. Because the 4s orbital is at a higher energy level

Answer :

Other Questions

Why do electrons enter the 4s orbital before entering the 3d orbital?

A. Because the 3d orbital is at a lower energy level
B. Because both the 4s and 3d orbitals are at the same energy level
C. Because the 4s orbital is at a lower energy level
D. Because the 4s orbital is at a higher energy level