Al
Aluminium
Z 13 26.982 g/molPost-Transition Metal
Nucleus
13 Protons
14 Neutrons
13 Electrons (3 Valence)
Shell distribution: K2 • L8 • M3 • N0 • O0 • P0 • Q0
Electron Configuration
Energy
7p
6d
5f
7s
6p
5d
4f
6s
5p
4d
5s
4p
3d
4s
3p
3s
2p
2s
1s
[Ne]3s23p1
Radii
Empirical
125 pm1.25 Å
Calculated
118 pm1.18 Å
Covalent
121±4 pm1.21±0.04 Å
van Der Waals
184 pm1.84 Å
Oxidation States
CommonRare
-2
-1
0
0
+1
+2
+3
Crystal Structure
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Face-centered Cubic