Xenon (Xe)

Atomic Number54
Atomic Mass131.2936 u
CategoryNoble gas
Electron Config[Kr] 4d¹⁰ 5s² 5p⁶
Appearancecolorless gas, exhibiting a blue glow when placed in a high voltage electric field
Density (STP)5.9 g/L
Melting Point161.4 K
Boiling Point165.051 K
Electronegativity2.6 (Pauling)
Ionization Energy1170.4 kJ/mol
Atomic Radius108 pm
Crystal StructureFace-centered Cubic
Discovered ByWilliam Ramsay (1898)

Brief Introduction

Xenon (Xe) is a colorless, dense, odorless noble gas that is chemically inert under normal conditions. It is the rarest non-radioactive noble gas in Earth's atmosphere. Key details about Xenon (Xe) are as follows:

Uses: Used in high-intensity discharge lamps (xenon arc lamps for movie projectors, searchlights), automotive HID headlights, flash lamps for photography, ion propulsion systems for spacecraft, medical imaging (xenon-enhanced CT scans), anesthesia, and excimer lasers.

Production/Extraction: Obtained from fractional distillation of liquid air. Xenon is extremely rare in the atmosphere (0.087 ppm), making it the most expensive of the natural noble gases. Production is energy-intensive and yields are small.

History: Discovered in 1898 by William Ramsay and Morris Travers in London through fractional distillation of liquid air residue, shortly after discovering krypton and neon. Named from Greek "xenos" (strange, foreign).

Health Effects & Safety: Non-toxic but can cause asphyxiation by displacing oxygen. Has anesthetic properties (used medically in some countries). Radioactive xenon isotopes (Xe-133) from nuclear fission can be hazardous but have medical diagnostic uses. No biological role.

Price/Market: Most expensive natural noble gas due to extreme rarity. High demand from lighting and medical applications. Production limited by atmospheric scarcity.

Properties: Very dense (heavier than air), chemically inert but forms compounds under extreme conditions (xenon hexafluoroplatinate was first noble gas compound synthesized in 1962), emits brilliant white light when electrically excited, has anesthetic properties, and exhibits multiple oxidation states (+2, +4, +6, +8) in compounds.

← Iodine (I) · Cesium (Cs) →

Periodic Table