Radon (Rn) - Element 86 | Properties & Electron Configuration
What is Radon?
Radon (Rn) is element 86, a noble gas in period 6, group 18. Its electron configuration is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 6s² 6p⁶.
| Atomic Number | 86 |
| Symbol | Rn |
| Atomic Mass | 222 u |
| Category | Noble Gas |
| Period | 6 |
| Group | 18 |
| Block | p |
| Electron Configuration | 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 6s² 6p⁶ |
| Short Config | [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶ |
| Electronegativity | N/A |
| Atomic Radius | 120 pm |
| Ionization Energy | 1037 kJ/mol |
| Electron Affinity | N/A |
| Phase (STP) | Gas |
Electron Configuration
The full electron configuration of Radon is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d¹⁰ 6s² 6p⁶. In noble gas shorthand, this is written as [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁶.
Radon is a p-block element in group 18, period 6.
Periodic Trends
Atomic Radius: 120 pm. Across period 6, atomic radius generally decreases left to right as nuclear charge increases.
Ionization Energy: 1037 kJ/mol. Ionization energy generally increases across a period and decreases down a group.
View all 118 elements with trend overlays for electronegativity, atomic radius, ionization energy, and electron affinity.
Explore Radon on the Interactive Periodic TableRelated Topics
Helium (He)
Properties of Helium - same group as Radon
Neon (Ne)
Properties of Neon - same group as Radon
Argon (Ar)
Properties of Argon - same group as Radon
Cesium (Cs)
Properties of Cesium - same period as Radon
Barium (Ba)
Properties of Barium - same period as Radon
Lanthanum (La)
Properties of Lanthanum - same period as Radon