Final answer:
The noble gas electron configuration of aluminum (Al) is 1s22s22p63s23p1.
Step-by-step explanation:
The electron configuration of Aluminum (Al) is 1s22s22p63s23p1. Aluminum has three valence electrons in the third energy level, 3s23p1. The cation, Al3+, is formed when these three valence electrons are lost, leaving the configuration for the noble gas neon, 1s22s22p6.