how many valence electrons does aluminum have?

Aluminum (Al) has 3 valence electrons. This is because its atomic number is 13, and its electron configuration is 1s22s22p63s23p11s^22s^22p^63s^23p^11s22s22p63s23p1. The valence electrons are the electrons in the outermost shell, which for aluminum is the third shell containing the 3s23p13s^23p^13s23p1 electrons, totaling three valence electrons