Neon (Ne)
10NeNeon20.18
Neon is element 10, a noble gas in period 2, group 18 of the periodic table. At room temperature it is a gas.
Electron configuration [He] 2s2 2p6
Electrons per shell 2, 8
Neon data
| Atomic number | 10 |
|---|---|
| Symbol | Ne |
| Atomic mass | 20.18 u |
| Category | Noble gas |
| Group | 18 |
| Period | 2 |
| Block | p |
| State at 25 °C | gas |
| Melting point | 25 K (-248.1 °C) |
| Boiling point | 27 K (-246.1 °C) |
| Density | 0.0009 g/cm³ (0.9 g/L) |
| Electronegativity (Pauling) | — |
| Atomic radius | 69 pm |
| 1st ionization energy | 2081 kJ/mol |
| Electron affinity | 0 kJ/mol |
| Oxidation states | 0 |
| Common ion charge | 0 |
| Discovered | 1898 |
Orbital diagram
Each box is one orbital holding up to two electrons of opposite spin. Following Hund’s rule, electrons spread out singly across a subshell before pairing.
↑↓
1s↑↓
2s↑↓↑↓↑↓
2pWork through neon’s configuration and its ions →
Where neon sits
Neon belongs to the noble gases. To use its mass in a calculation, try the molar mass calculator.
Neon FAQ
What is the electron configuration of neon?
Neon (Z = 10) has the configuration 1s2 2s2 2p6. In noble-gas shorthand that is [He] 2s2 2p6.
How many valence electrons does neon have?
8 (full outer shell).
What is the atomic mass of neon?
The standard atomic weight of neon is 20.18 u, so one mole weighs 20.18 g.
Is neon a metal?
No. Neon is a noble gas.
What is the charge of a neon ion?
Neon most commonly forms no ions.