Arsenic
Block pPeriod 4Group 15solid at 20 °C
Configuration :[Ar] 3d¹⁰ 4s² 4p³
Atomic mass :74.921595 u
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Modèle de Bohr · pédagogique
Electron configuration
Full1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p³
Short[Ar] 3d¹⁰ 4s² 4p³
Valence electrons5
KLMNOPQ shells
K2
L8
M18
N5
Electronegativity
Pauling2.18
Allen2.211
Mulliken (eV)—
Atomic radii
Empirical115 pm
Calculated114 pm
Covalent119 pm
Van der Waals185 pm
Ionic radii (Shannon-Prewitt)
+358 pm
Successive ionisation energies
I₁947 kJ/mol
I₂1798 kJ/mol
I₃2735 kJ/mol
I₄4837 kJ/mol
I₅6043 kJ/mol
Electron affinity78 kJ/mol
Oxidation states
-3-2-10+1+2+3+4+5
Bold states = most common.