10Ne20.1797
Neon
Noble gasesBlock pPeriod 2Group 18gas at 20 °C
- Configuration :
- [He] 2s² 2p⁶
- Atomic mass :
- 20.1797 u
- French :
- Néon
3D Bohr-model representation of the Neon atom (symbol Ne, atomic number Z=10). Electron shell configuration: 2, 8 electrons.
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Bohr model · educational
Bohr model of neon
Neon (Ne) has 10 electrons, spread over 2 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 |
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
First look at the periodic classification
Reading the table, spotting families (alkali metals, halogens, noble gases). Why some elements share properties.
9 minElectron configuration
Full1s² 2s² 2p⁶
Short[He] 2s² 2p⁶
Valence electrons8
KLMNOPQ shells
K2
L8
Electronegativity
Pauling—
Allen4.787
Mulliken (eV)—
Atomic radii
Empirical160 pm
Calculated38 pm
Covalent58 pm
Van der Waals154 pm
Successive ionisation energies
I₁2080.7 kJ/mol
I₂3952.3 kJ/mol
I₃6122 kJ/mol
I₄9371 kJ/mol
I₅12177 kJ/mol
Electron affinity—
Oxidation states
0
Bold states = most common.
Warm-up
Neon — 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