Answer:
The electron configuration of an aluminum atom in its ground state is 1s² 2s² 2p⁶ 3s² 3p¹.
An excited state of aluminum means that one or more of its electrons have been promoted to a higher energy level. One possible excited state electron configuration for aluminum is 1s² 2s² 2p⁶ 3s² 3p², where one of the 3p electrons has been promoted to a higher energy level.