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.
Scroll to activate 3D
Bohr model · educational
Bohr model of uranium
Uranium (U) has 92 electrons, spread over 7 shells. The diagram places them on circles around the nucleus, from the K shell — the closest — outward.
| Shell | Electrons |
|---|---|
| K (n = 1) | 2 |
| L (n = 2) | 8 |
| M (n = 3) | 18 |
| N (n = 4) | 32 |
| O (n = 5) | 21 |
| P (n = 6) | 9 |
| Q (n = 7) | 2 |
The Bohr model is a teaching picture: electrons do not travel in circular orbits, but the number of electrons per shell is exact.
Related lesson
Spin-orbit coupling
Spin angular momentum, orbital momentum, L-S and j-j coupling. Effects on atomic levels.
14 minElectron configuration
Full1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 4f¹⁴ 5d¹⁰ 6s² 6p⁶ 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.
Warm-up
Uranium — do you remember?
3 questions on this page. The right answer shows every time, and nothing is asked of you to play.
No account · one minute