Aluminium
Block pPeriod 3Group 13solid at 20 °C
Configuration :[Ne] 3s² 3p¹
Atomic mass :26.9815384 u
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Modèle de Bohr · pédagogique
Electron configuration
Full1s² 2s² 2p⁶ 3s² 3p¹
Short[Ne] 3s² 3p¹
Valence electrons3
KLMNOPQ shells
K2
L8
M3
Electronegativity
Pauling1.61
Allen1.613
Mulliken (eV)—
Atomic radii
Empirical125 pm
Calculated118 pm
Covalent121 pm
Van der Waals184 pm
Ionic radii (Shannon-Prewitt)
+353 pm
Successive ionisation energies
I₁577.5 kJ/mol
I₂1816.7 kJ/mol
I₃2744.8 kJ/mol
I₄11577 kJ/mol
I₅14842 kJ/mol
Electron affinity41.8 kJ/mol
Oxidation states
-2-1+1+2+3
Bold states = most common.