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3D Bohr-model representation of the Antimony atom (symbol Sb, atomic number Z=51). Electron shell configuration: 2, 8, 18, 18, 5 electrons.
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Bohr model · educational
Electron configuration
Full1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p³
Short[Kr] 4d¹⁰ 5s² 5p³
Valence electrons5
KLMNOPQ shells
K2
L8
M18
N18
O5
Electronegativity
Pauling2.05
Allen1.984
Mulliken (eV)—
Atomic radii
Empirical145 pm
Calculated133 pm
Covalent139 pm
Van der Waals206 pm
Ionic radii (Shannon-Prewitt)
+376 pm
Successive ionisation energies
I₁834 kJ/mol
I₂1594.9 kJ/mol
I₃2440 kJ/mol
I₄4260 kJ/mol
I₅5400 kJ/mol
Electron affinity103.2 kJ/mol
Oxidation states
-3-2-10+1+2+3+4+5
Bold states = most common.