Radon (Rn)
[Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶. 0 unpaired electrons, period 6, 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.
RnRadon, Z = 86, [222] u
[Xe] 4f14 5d10 6s2 6p6
In full: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 6s² 6p⁶
- Blockp block
- Period6
- Group18
- Valence8
- Unpaired0
- MagneticDia
Last electron 6p
- n6shell
- l1p subshell
- m+1orbital
- s−½spin down
Step by step
- Radon has 86 electrons.
- Fill in (n + l) order: 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁶ 6s² 4f¹⁴ 5d¹⁰ 6p⁶.
- Write the subshells in order of n: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 6s² 6p⁶.
- Replace the xenon core with [Xe]: [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶.
Radon (Rn): the numbers
| Atomic number | 86 |
|---|---|
| Atomic mass | [222] u |
| Period | 6 |
| Group | 18 |
| Block | p block |
| Valence electrons | 8 |
| Unpaired electrons | 0 |
| Magnetic | diamagnetic |
| Last electron | 6p: n = 6, l = 1, m = +1, s = −1/2 |
Radon (Rn): quick answers
What is the electronic configuration of radon?
Radon has 86 electrons: 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 6s² 6p⁶, or [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶ in short.
How many unpaired electrons does radon have?
Radon 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 radon?
The last electron goes into 6p: n = 6, l = 1, m = +1, s = −1/2. Orbitals fill from m = −l up, spin +½ first.