54
Xe
131.29
Xenon (Xe)
Element 54 · Period 5 · Group 18
noble-gas
gas at room temp
p-block
About Xenon
Used in high-intensity lamps, anesthesia, and ion propulsion for spacecraft.
Physical Properties
Atomic Mass
131.29 u
State at 25°C
Gas
Melting Point
-111.75 °C
Boiling Point
-108.12 °C
Density
0.005887 g/cm³
Magnetism
Diamagnetic
Atomic Properties
Electron Configuration
[Kr] 4d¹⁰ 5s² 5p⁶
Electron Shells
2, 8, 18, 18, 8
Electronegativity
2.6
Atomic Radius
108 pm
Ionization Energy
1170 kJ/mol
Oxidation States
0, +2, +4, +6
Discovery & History
Discovered By
William Ramsay
Discovery Year
1898
Named By
William Ramsay
Name origin: Greek: xenos (stranger)
Frequently Asked Questions
- Is Xenon a metal, nonmetal, or metalloid?
- Xenon is classified as a noble-gas.
- What state is Xenon in at room temperature?
- Xenon is a gas at standard room temperature (25°C).
- What is the atomic mass of Xenon?
- Xenon has an atomic mass of 131.29 atomic mass units (u).
- Who discovered Xenon?
- Xenon was discovered by William Ramsay in 1898.
- Where is Xenon on the periodic table?
- Xenon is element number 54, located in period 5 and group 18.