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71Lu174.966
Lutetium
LanthanidesBlock fPeriod 6solid at 20 °C
Configuration :[Xe] 4f¹⁴ 5d¹ 6s²
Atomic mass :174.9668 u
French :Lutécium
3D Bohr-model representation of the Lutetium atom (symbol Lu, atomic number Z=71). Electron shell configuration: 2, 8, 18, 32, 9, 2 electrons.
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Bohr model · educational
Electron configuration
Full[Xe] 4f¹⁴ 5d¹ 6s²
Short[Xe] 4f¹⁴ 5d¹ 6s²
Valence electrons3
KLMNOPQ shells
K2
L8
M18
N32
O9
P2
Electronegativity
Pauling1.27
Allen—
Mulliken (eV)—
Atomic radii
Empirical175 pm
Calculated217 pm
Covalent187 pm
Van der Waals—
Ionic radii (Shannon-Prewitt)
+386.1 pm
Successive ionisation energies
I₁523.5 kJ/mol
I₂1340 kJ/mol
I₃2022.3 kJ/mol
I₄4370 kJ/mol
Electron affinity—
Oxidation states
+2+3
Bold states = most common.