10Ne

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

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.

Use 20.18 g/mol in these solvers

Moles from Mass (n = m/M)

n = \frac{m}{M}

Opens with M = 20.18 g/mol already filled in

Gas Density from Molar Mass

\rho = \frac{PM}{RT}

Opens with M = 20.18 g/mol already filled in

Faraday's Law of Electrolysis (m = QM/nF)

m = \frac{Q M}{n F}

Opens with M = 20.18 g/mol already filled in

Ion Concentration as CaCO₃ Equivalent

C_{\mathrm{CaCO_3}} = C_{\mathrm{ion}} \times \frac{50.04}{\mathrm{EW}}

Opens with EW = 20.18 g/mol already filled in

Acid Feed to Reduce Alkalinity

\dot m = \frac{\Delta \mathrm{Alk} \, Q \times \frac{\mathrm{EW}}{50.04}}{p/100\%}

Opens with EW = 20.18 g/mol already filled in

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