Properties of Neon (Ne)

Neon is a chemical element with the symbol (Ne) and atomic number 10. It is a colorless, odorless noble gas that is found in small amounts in the Earth’s atmosphere. Neon is known for its distinctive bright red-orange glow when used in neon signs and lighting.

The following table provides a comprehensive list of neon properties in both SI and US customary/Imperial units at normal temperature and pressure (NTP).

Click on the icon to switch between Metric and Imperial units.

Table of Neon Properties
Physical Properties
Metric
Molar Mass20.1797 g/mol
Density (0°C)0.9 kg/m3
Dynamic Viscosity (25°C)31.9 µPa·s
Speed of Sound in Gas (0°C)433 m/s
Thermal PropertiesMetric
Melting Point-248.6 °C
Boiling Point-246 °C
Thermal Conductivity (25°C)0.0494 W/m·K
Specific Heat Capacity (Cp)1030 J/kg·K
Critical ConstantsMetric
Critical Temperature (Tc)-228.8 °C
Critical Pressure (Pc)2.76 MPa
Critical Density (ρc)483 kg/m3
Electrical PropertiesMetric
Relative Permittivity (εr)1.000127
Optical PropertiesMetric
Refractive Index (589 nm)1.000067

Unless stated otherwise, all values are taken at room temperature (approximately 20°C or 68°F) and 1 atm pressure. (1 atm = 101,325 Pa)

References: 1) Cardarelli, François. Materials Handbook: A Concise Desktop Reference. Switzerland: Springer International Publishing, 2018. 2) CRC Handbook of Chemistry and Physics, 97th Edition. United Kingdom: CRC Press, 2016-2017. 3) Yaws, Carl L. The Yaws Handbook of Physical Properties for Hydrocarbons and Chemicals. Netherlands: Elsevier Science, 2015. 4) Fire Protection Guide to Hazardous Materials, 14th Edition. United States: National Fire Protection Association, 2010.