10 Ne 20.18
Neon
Noble Gas
Neon (Ne) is a chemical element with atomic number 10, classified as a noble gas. At room temperature it is a gas. It was discovered in 1898 by William Ramsay, Morris Travers.
Properties
- Atomic number
- 10
- Atomic mass
- 20.18 u
- Category
- Noble Gas
- Group
- 18
- Period
- 2
- Block
- p-block
- Electron configuration
- [He] 2s² 2p⁶
- Phase at STP
- Gas
- Density
- 0.9002 g/L
- Melting point
- 24.56 K (-248.6 °C)
- Boiling point
- 27.07 K (-246.1 °C)
- Electronegativity
- —
- Atomic radius
- 38 pm
- Ionization energy
- 21.565 eV
- Discovery
- 1898 · William Ramsay, Morris Travers
Common uses
Neon signs, high-voltage indicators, lasers
Did you know?
Creates the iconic orange-red glow in neon signs and is chemically inert.