Aluminum Valence Electrons
Why aluminum has 3
Aluminum has 13 electrons, arranged as 1s2 2s2 2p6 3s2 3p1. The highest shell is n = 3, holding 3s2 3p1, so 2 + 1 = 3.
Aluminum is in group 13; for groups 13–18 subtract 10 from the group number.
What that means for bonding
As a metal, aluminum tends to lose valence electrons rather than gain them, forming Al3+ ions.
Electrons per shell: 2, 8, 3. See the aluminum electron configuration and orbital diagram or the full aluminum data sheet.
Same group, same count
Aluminum valence electrons FAQ
How many valence electrons does aluminum have?
Aluminum has 3 valence electrons. Its electron configuration is 1s² 2s² 2p⁶ 3s² 3p¹, and the outermost shell (n = 3) holds 3s² + 3p¹.
How do you find the valence electrons of aluminum?
Aluminum is in group 13; for groups 13–18 subtract 10 from the group number.
How many bonds does aluminum form?
As a metal, aluminum tends to lose valence electrons rather than gain them, forming Al3+ ions.
What is the Lewis dot structure of aluminum?
The symbol Al with 3 dots around it, one per valence electron, placed singly on each side before any side is paired.
How many core electrons does aluminum have?
10: 13 electrons in total minus the 3 valence electrons.