Neon (Ne) – element 10
Neon is a chemical element with the symbol Ne and atomic number 10. It is a noble gas in group 18 (noble gases), period 2 of the periodic table (p-block), and is a gas at room temperature.
Neon (Ne) has atomic number 10, atomic mass 20.18 u and electron configuration [He] 2s2 2p6.
Neon facts
| Symbol | Ne |
|---|---|
| Atomic number | 10 |
| Atomic mass | 20.18 u (g/mol) |
| Category | noble gas |
| Group | group 18 (noble gases) |
| Period | 2 |
| Block | p-block |
| Phase at 20 °C | Gas |
| Electron configuration | 1s2 2s2 2p6 |
| Noble-gas notation | [He] 2s2 2p6 |
| Electrons per shell | 2, 8 |
| Valence electrons | 8 |
Bohr model and shells
Neon has 10 electrons in 2 shells: 2, 8. Full configuration and noble-gas notation are in the table; work out any element or ion with the electron configuration calculator.
Physical and atomic properties
| Melting point | 24.56 K (-248.6 °C) |
|---|---|
| Boiling point | 27.104 K (-246.0 °C) |
| Density | 0.9002 g/L |
| Electron affinity | -116 kJ/mol |
| Ionization energies | 2080.7, 3952.3, 6122 kJ/mol (1st, 2nd, 3rd) |
| Discovered by | Morris Travers |
Use the atomic mass in the molar mass calculator for any formula containing Ne.
Position in the periodic table
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Frequently asked questions
What is the atomic mass of neon?
The atomic mass of neon is 20.18 u, so one mole of neon atoms weighs 20.18 g.
What is the electron configuration of neon?
Neon has 10 electrons: 1s² 2s² 2p⁶, or [He] 2s² 2p⁶ in noble-gas notation. Electrons per shell: 2, 8.
How many valence electrons does neon have?
Neon has 8 valence electrons (group 18).
Is neon a metal?
No. Neon is a nonmetal (noble gas).
Where is neon on the periodic table?
Neon is in group 18 (noble gases), period 2, in the p-block.
Data: Periodic-Table-JSON (CC BY-SA 3.0); standard atomic weights from IUPAC (abridged). Values in brackets are the mass number of the longest-lived isotope.