NEON
NOBLE GAS
| Atomic number: | 10 |
| Group numbers: | 18 |
| Period: | 2 |
| Electronic configuration: | [He] 2s2 2p6 |
| Formal oxidation number: | 0 |
| Electronegativities: | - |
| Atomic radius / pm: | 154 |
| Relative atomic mass: | 20.1797(6) |
Neon was discovered by Sir William Ramsay and Morris William Travers (GB) in 1898. The origin of the name comes from the Greek word neon meaning new. It is a colourless, odourless inert gas. It doesn't react, not even with fluorine. Neon is the fourth most abundant element in the universe. Neon is obtained by liquefaction of air and separated from the other gases by fractional distillation. The largest use for neon gas is in advertising signs. The price of 99.999 % pure neon gas costs 165.30 €/dm3 in small quantities (1 dm3) and about 2.81 €/dm3 in large quantities (300 dm3).
| Density / g dm-3: | 1444 | (solid, m.p.) |
| 1207.3 | (liquid, b.p.) | |
| 0.89994 | (gas, 273 K) | |
| Molar volume / cm3mol-1: | 13.97 | (solid, m.p.) |
| 16.71 | (liquid, b.p.) | |
| 22423.38 | (gas, 273 K) | |
| Electrical resistivity / µΩcm: | - | (20 °C) |
| Thermal conductivity / W m-1K-1: | 0.0491 |
| Melting point / °C: | -248.59 |
| Boiling point / °C: | -246.08 |
| Heat of fusion / kJ mol-1: | 0.324 |
| Heat of vaporization / kJ mol-1: | 1.736 |
| Heat of atomization / kJ mol-1: | 0 |
| First ionization energy / kJ mol-1: | 2080.68 |
| Second ionization energy / kJ mol-1: | 3952.38 |
| Third ionization energy / kJ mol-1: | 6122.04 |
| in the atmosphere / ppm: | 18 |
| in the Earth's crust / ppm: | 0.00007 |
| in the oceans / ppm: | 0.04 |
| Crystal structure: | face-centered cubic |
| Unit-cell dimensions / pm: | a=445.462 |
| Space group: | Fm3m |
| Isotope | Relative atomic mass | Mass percent (%) |
|---|---|---|
| 20Ne | 19.992440176(2) | 90.48(3) |
| 21Ne | 20.99384674(4) | 0.27(1) |
| 22Ne | 21.9913855(2) | 9.25(3) |
| Balanced half-reaction | Eo / V | |
|---|---|---|
| 9 Fluorine | ← | 10 Neon | → | 11 Sodium |
Citing this page:
Generalic, Eni. "Neon." EniG. Periodic Table of the Elements. KTF-Split, 18 Jan. 2024. Web. {Date of access}. <https://www.periodni.com/ne.html>.
