10Gas
Ne 20.18 Atomic mass · uNoble gases
Neon
Neon is a chemical element with symbol Ne and atomic number 10. It is in group 18 (noble gases) of the periodic table. Neon is a colorless, odorless, inert monatomic gas under standard conditions, with about two-thirds the density of air.
Discovery 1898 (Morris Travers)
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Physical properties
Values for the element in its standard state.
- Density
- 0.0009g/cm³
- Melting point
- 25K
- Boiling point
- 27K
- Atomic radius
- 69pm
- Bonding type
- Atomic
- Molar heat
- Not available
Inside the atom
Electron arrangement and the energy behind its behavior.
Full electron configuration
1s, 2 electrons; 2s, 2 electrons; 2p, 6 electrons;
[He] represents 2 core electrons. The full view shows them explicitly.
10 electrons Orbital order preserved from source
- Electronegativity
- Not availablePauling scale
- First ionization energy
- 2,081kJ/mol
- Electron affinity
- 0kJ/mol
- Van der Waals radius
- 154pm
Ne NeonAtomic number 10
2,081kJ/mol
Atomic numberGaps indicate unavailable data
About neon
- Appearance
- Colorless gas exhibiting an orange-red glow when placed in a high voltage electric field
- Discovery
- 1898 (Morris Travers)
- Data source
- Read the reference
A missing value means it is unavailable in this reference dataset. Values can vary with measurement method and conditions.