Question

Why do electrons first fill degenerate orbitals in an unpaired manner and then in a paired manner as more electrons are placed into those orbitals?

a. to obey the Aufbau principle
b. to reduce the attraction between the electrons and the nucleus
c. to ensure that a subshell fill first
d. to minimize electron-electron replusion

Answer 1

i would say minimizing e-e repulsion because this is Hunds rule , not aufbau