Bore
Block pPeriod 2Group 13solid at 20 °C
Configuration :[He] 2s² 2p¹
Atomic mass :10.81 u
English :Boron
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Modèle de Bohr · pédagogique
Electron configuration
Full1s² 2s² 2p¹
Short[He] 2s² 2p¹
Valence electrons3
KLMNOPQ shells
K2
L3
Electronegativity
Pauling2.04
Allen2.051
Mulliken (eV)—
Atomic radii
Empirical85 pm
Calculated87 pm
Covalent84 pm
Van der Waals192 pm
Ionic radii (Shannon-Prewitt)
+327 pm
Successive ionisation energies
I₁800.6 kJ/mol
I₂2427.1 kJ/mol
I₃3659.7 kJ/mol
I₄25025.8 kJ/mol
I₅32826.7 kJ/mol
Electron affinity26.7 kJ/mol
Oxidation states
-5-10+1+2+3
Bold states = most common.