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92U238.028
Uranium
ActinidesBlock fPeriod 7solid at 20 °C
Configuration :[Rn] 5f³ 6d¹ 7s²
Atomic mass :238.02891 u
3D Bohr-model representation of the Uranium atom (symbol U, atomic number Z=92). Electron shell configuration: 2, 8, 18, 32, 21, 9, 2 electrons.
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Bohr model · educational
Electron configuration
Full[Rn] 5f³ 6d¹ 7s²
Short[Rn] 5f³ 6d¹ 7s²
Valence electrons6
KLMNOPQ shells
K2
L8
M18
N32
O21
P9
Q2
Electronegativity
Pauling1.38
Allen—
Mulliken (eV)—
Atomic radii
Empirical175 pm
Calculated222 pm
Covalent196 pm
Van der Waals186 pm
Ionic radii (Shannon-Prewitt)
+673 pm
Successive ionisation energies
I₁597.6 kJ/mol
I₂1420 kJ/mol
Electron affinity—
Oxidation states
+1+2+3+4+5+6
Bold states = most common.