Neon (Ne)
[He] 2s² 2p⁶. 0 unpaired electrons, period 2, group 18, p block.
Element or ion
Type a symbol, a name or an atomic number, add a charge such as Fe3+ or Cl-, or tap an element in the table. Orbitals fill from m = −l up, spin +½ first.
NeNeon, Z = 10, 20.18 u
[He] 2s2 2p6
In full: 1s² 2s² 2p⁶
- Blockp block
- Period2
- Group18
- Valence8
- Unpaired0
- MagneticDia
Last electron 2p
- n2shell
- l1p subshell
- m+1orbital
- s−½spin down
Step by step
- Neon has 10 electrons.
- Fill in (n + l) order: 1s² 2s² 2p⁶.
- Write the subshells in order of n: 1s² 2s² 2p⁶.
- Replace the helium core with [He]: [He] 2s² 2p⁶.
Neon (Ne): the numbers
| Atomic number | 10 |
|---|---|
| Atomic mass | 20.18 u |
| Period | 2 |
| Group | 18 |
| Block | p block |
| Valence electrons | 8 |
| Unpaired electrons | 0 |
| Magnetic | diamagnetic |
| Last electron | 2p: n = 2, l = 1, m = +1, s = −1/2 |
Neon (Ne): quick answers
What is the electronic configuration of neon?
Neon has 10 electrons: 1s² 2s² 2p⁶, or [He] 2s² 2p⁶ in short.
How many unpaired electrons does neon have?
Neon has 0 unpaired electrons, so it is diamagnetic. Put one electron in each box of a subshell before pairing (Hund’s rule) to see them.
What are the quantum numbers of the last electron of neon?
The last electron goes into 2p: n = 2, l = 1, m = +1, s = −1/2. Orbitals fill from m = −l up, spin +½ first.