Select all the options that correctly complete the sentence: the ground-state electron configuration obeys Hund's rule -obeys the Aufbau principle.
The Aufbau principle states that in the ground state of an atom or ion, electrons fill the subshells with the lowest available energy and then they fill the subshells with higher energies. For example, the first subshell is filled before the second subshell is loaded.
The Aufbau principle states that electrons fill lower energy atomic orbitals before filling higher energy atomic orbitals. By following this rule, you can predict the electronic configuration of atoms or ions.
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