Neon
noble gas · period 2 · group 18 (noble gases) · p-block
Neon is a chemical element with the symbol Ne and atomic number 10. It is a noble gas.
What the numbers say
At standard temperature and pressure Neon is a gas, sitting in period 2, group 18 of the p-block.
Its melting point of 25 K (-249 °C) is the 108th highest of the 110 elements with a measured value — among the lowest-melting elements.
At 0.001 g/cm³ it is the 94th densest of 96 elements with a quoted density.
In the solid state it takes a face-centered cubic structure — FCC packing gives 12 independent slip systems, which is why FCC metals are the ductile, formable ones.
First identified in 1898.
Crystal structure
Solid Neon adopts a Face-centered Cubic arrangement, in the Cubic (isometric) system — axes a = b = c, angles α = β = γ = 90°. Symmetry controls the anisotropy of stiffness and thermal expansion, and the available slip systems set how far the metal deforms before it fractures.
Check it against computed structures
The structure search queries the Materials Project, OQMD and the Open Materials Database for computed crystal structures containing Ne — with DFT formation energy, hull stability and band gap where the provider publishes them.
K 2 · L 8
Properties
| Atomic number | 10 |
|---|---|
| Atomic mass | 20.17976 u |
| Series | noble gas |
| Group | 18 |
| Period | 2 |
| Block | p-block |
| Phase at STP | Gas |
| Density | 0.001 g/cm³ |
| Melting point | 24.56 K (-249 °C) |
| Boiling point | 27.1 K (-246 °C) |
| Electron configuration | [He] 2s² 2p⁶ |
| Crystal structure | Face-centered Cubic |
| Discovered | 1898 |
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See Ne in context with all 118 elements.
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