54Xe131.293
Xenon
Noble gasesBlock pPeriod 5Group 18gas at 20 °C
- Configuration :
- [Kr] 4d¹⁰ 5s² 5p⁶
- Atomic mass :
- 131.293 u
- French :
- Xénon
3D Bohr-model representation of the Xenon atom (symbol Xe, atomic number Z=54). Electron shell configuration: 2, 8, 18, 18, 8 electrons.
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Bohr model · educational
Bohr model of xenon
Xenon (Xe) has 54 electrons, spread over 5 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) | 18 |
| O (n = 5) | 8 |
The Bohr model is a teaching picture: electrons do not travel in circular orbits, but the number of electrons per shell is exact.
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AXₙEₘ formalism, systematic geometry prediction. Pathological cases and limits.
12 minElectron configuration
Full1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶
Short[Kr] 4d¹⁰ 5s² 5p⁶
Valence electrons8
KLMNOPQ shells
K2
L8
M18
N18
O8
Electronegativity
Pauling2.6
Allen2.582
Mulliken (eV)—
Atomic radii
Empirical108 pm
Calculated108 pm
Covalent140 pm
Van der Waals216 pm
Successive ionisation energies
I₁1170.4 kJ/mol
I₂2046.4 kJ/mol
I₃3099.4 kJ/mol
Electron affinity—
Oxidation states
0+1+2+4+6+8
Bold states = most common.
Warm-up
Xenon — 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