Neon
Noble gasgasblock p
The noble gas that glows orange-red in a discharge tube and gave the twentieth century its signature nightscape.
| Atomic number | 10 |
| Standard atomic weight | 20.18 g/mol ± 0.001 |
| Group · period | 18 · 2 |
| Electron configuration | [He] 2s² 2p⁶ |
| Source | IUPAC standard atomic weights (2021) |
About Neon
Ramsay and Travers found neon in 1898 by fractionating liquid air, and Travers wrote that the crimson glow of its discharge tube told its own story and was a sight to dwell upon. Georges Claude turned that glow into commerce, showing the first neon sign in Paris in 1910; strictly, only the orange-red tubes are neon, since every other colour comes from argon, mercury vapour or a phosphor coating. Neon also has a quiet claim on the history of physics: in 1913 J. J. Thomson passed neon ions through electric and magnetic fields and saw two parabolas, at masses 20 and 22 — the first demonstration that a stable, non-radioactive element could exist as more than one isotope. It is chemically inert to the point of having no known stable compounds at all.
Moles from Mass (n = m/M)
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Gas Density from Molar Mass
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Faraday's Law of Electrolysis (m = QM/nF)
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Mach Number
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Metal Hydroxide Sludge from Metal Removed
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ppm to mg/m³ Conversion
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