Chemical element · Atomic number 10
Neon
Neon in the periodic table: atomic number 10, electron configuration, atomic mass, physical data, oxidation states, media credit and visible sources.
Noble gas
gaseous
20.180 u
A locally stored, license-verified sample photograph has not been curated yet.
Atomic classification
Shell occupancy
Neon in the Bohr shell model
This shows the electron distribution of the neutral atom in a simplified shell model.
- K · n=1
- 2 electrons
- L · n=2
- 8 electrons
- Electron configuration
- [He]2s2 2p6
- Electrons per shell
- 2 · 8
- Group
- 18
- Period
- 2
- Block
- P
- Element category
- Noble gas
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Physical and chemical properties
- Atomic mass
- 20.180 u
- Standard state
- gaseous
- Density
- 0.0008999 g/cm³
- Melting point
- 24.56 K
- Boiling point
- 27.07 K
- Electronegativity
- not reported
- First ionisation energy
- 21.565 eV
- Oxidation states
- 0
- Discovery
- 1898
Safety and periodic classification
Safety
Safe handling cannot be inferred from Neon's position in the periodic table alone. Laboratory, classroom and disposal decisions must follow the documentation for the exact material and its safety data sheet.
Position and comparison
Neon is in period 2, group 18 and the P block. Its direct neighbours by atomic number are Fluorine and Sodium. The snapshot does not report a Pauling electronegativity. Periodic trends are compared only through the separately sourced neighbouring values.
Sources and scope
PubChem attributes element data to sources including IUPAC, NIST and IAEA. Quanta stores the referenced snapshot locally and leaves unknown values unavailable.