Neon (Ne): Electron Configuration, Properties and Uses
Neon (Ne): Electron Configuration, Properties and Uses
Electron configuration [He] 2s2 2p6 · group 18 · period 2 · Ar 20.18
Neon data
- Atomic number
- 10
- Relative atomic mass
- 20.18
- Group
- 18
- Period
- 2
- Block
- p
- Category
- Noble gas
- Electron configuration
- [He] 2s2 2p6
- Full configuration
- 1s2 2s2 2p6
- Electrons per shell
- 2, 8 (K L)
- Valence electrons
- 8
- Electronegativity (Pauling)
- no data
- First ionisation energy
- 21.565 eV
- Atomic radius (van der Waals)
- 154 pm
- State at room temperature
- Gas
- Melting point
- −249 °C
- Boiling point
- −246 °C
- Density
- 0.8999 g/L (0 °C, 1 atm)
- Common oxidation states
- 0
- Discovered
- 1898
Source: PubChem (NIH, accessed 13 Nov 2026); atomic mass: IUPAC standard atomic weight.
Electron shell diagram
K 2 · L 8
Orbital diagram (outer electrons)
About neon
With atomic number 10, neon (Ne) has 10 protons in its nucleus and 10 electrons as a neutral atom. It is a noble gas in group 18, period 2, p-block. Neon was first discovered in 1898. At room temperature neon is a gas that is lighter than air (0.8999 g/L) and liquefies at −246 °C.
Neon electron configuration
The electron configuration of neon is 1s2 2s2 2p6, or in short [He] 2s2 2p6. Its electrons occupy 2 shells: K = 2, L = 8. Neon has 8 valence electrons in the L shell (2s2 2p6), which is why it sits in group 18.
Filling order: 1s2(2) → 2s2(4) → 2p6(10)
Uses of neon
In industry and the laboratory, neon turns up in many places, for example neon signs, helium-neon lasers and cryogenic cooling.
Safety
Neon is non-toxic and almost unreactive, but large amounts in a closed room can displace oxygen. Always read the safety data sheet (SDS) before working with a chemical.
Other elements in group 18
Frequently asked questions
What is the electron configuration of neon?
The electron configuration of neon (Ne, atomic number 10) is 1s2 2s2 2p6, or [He] 2s2 2p6 in short. By shell: 2, 8.
How many valence electrons does neon have?
Neon has 8 valence electrons.
Which group and period is neon in?
Neon is in group 18, period 2, p-block.
What is the atomic mass of neon?
The relative atomic mass of neon is 20.18. Use it to calculate molar mass with the molar mass calculator.
Prepare solutions with analytical-grade reagents
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