how many valence electrons does aluminum have

Aluminum has 3 valence electrons. This is because aluminum is in Group 13 (also called 3A) of the periodic table, and elements in this group have three electrons in their outermost shell. The electron configuration of aluminum is 1s22s22p63s23p11s^22s^22p^63s^23p^11s22s22p63s23p1, showing three electrons (two in 3s and one in 3p) in the highest energy level, which are its valence electrons