Xenon (Xe) - Element 54 | Properties & Electron Configuration
What is Xenon?
Xenon (Xe) is element 54, a noble gas in period 5, group 18. Its electron configuration is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶.
| Atomic Number | 54 |
| Symbol | Xe |
| Atomic Mass | 131.29 u |
| Category | Noble Gas |
| Period | 5 |
| Group | 18 |
| Block | p |
| Electron Configuration | 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ |
| Short Config | [Kr] 4d¹⁰ 5s² 5p⁶ |
| Electronegativity | 2.6 |
| Atomic Radius | 108 pm |
| Ionization Energy | 1170 kJ/mol |
| Electron Affinity | N/A |
| Phase (STP) | Gas |
Electron Configuration
The full electron configuration of Xenon is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶. In noble gas shorthand, this is written as [Kr] 4d¹⁰ 5s² 5p⁶.
Xenon is a p-block element in group 18, period 5.
Periodic Trends
Electronegativity: Xenon has a Pauling electronegativity of 2.6. Within group 18, electronegativity generally decreases down the group.
Atomic Radius: 108 pm. Across period 5, atomic radius generally decreases left to right as nuclear charge increases.
Ionization Energy: 1170 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 Xenon on the Interactive Periodic TableRelated Topics
Helium (He)
Properties of Helium - same group as Xenon
Neon (Ne)
Properties of Neon - same group as Xenon
Argon (Ar)
Properties of Argon - same group as Xenon
Rubidium (Rb)
Properties of Rubidium - same period as Xenon
Strontium (Sr)
Properties of Strontium - same period as Xenon
Yttrium (Y)
Properties of Yttrium - same period as Xenon