Neon (Ne)
Neon (Ne) is element 10 of the periodic table, a noble gas in period 2 and group 18. Its standard atomic weight is 20.1797, so one mole of neon atoms has a mass of 20.1797 g. At room temperature it is a gas; it melts at -248.59 °C and boils at -246.08 °C.
| Atomic number | 10 |
|---|---|
| Symbol | Ne |
| Standard atomic weight | 20.1797 |
| Molar mass | 20.1797 g/mol |
| Category | Noble gas |
| Group | 18 |
| Period | 2 |
| Block | p-block |
| Electron configuration | [He] 2s2 2p6 |
| Oxidation states | 0 |
| Electronegativity (Pauling) | — |
| Atomic radius (van der Waals) | 154 pm |
| First ionisation energy | 21.565 eV (2080.7 kJ/mol) |
| Electron affinity | — |
| State at room temperature | Gas |
| Melting point | 24.56 K (-248.59 °C) |
| Boiling point | 27.07 K (-246.08 °C) |
| Density | 0.8999 g/L |
| Discovered | 1898 |
Group 18
Calculate with Neon
Atomic weight: IUPAC CIAAW standard atomic weight. Other properties: PubChem (U.S. National Library of Medicine, public domain). Values such as melting point and radius depend on how they were measured; check a data book for precise work.