Element #54


Xenon is the 54th element on the periodic table of the elements and also is one of the Noble gases. Xenon was discovered in 1898 by Ramsay and Travers in England. They gave the name Xenon which comes from xenos meaning strange, because of the weird properties it has for a noble gas that other noble gases don't have.

Properties of Xenon

Atomic number - 54

Average atomic mass - 131.294

Electron configuration - Kr4d105s2p6

Freezing point - 161.4 K

Boiling point - 165.1 K

Heat of fusion - 2.313 kJ/mol

Heat of vaporization - 12.640 kJ/mol

Oxidation states - 0,2,4,6

Density - 5.89 g/ml

Electronegativity - 2.6

Most stable/abundant isotope - 132Xe

Ionic radius - 220

First ionization energy - 1170 kJ/mol

Specific heat at 25 degrees Celsius - 20.786 J/mol x K

Abundance in crustal rocks - 0.000002

Half-life of longest-lived radioactive isotope - 36.3 days

Longest-lived radioactive isotope - 127Xe

Common use of Xenon

Xenon a noble gas

Other information

Xenon is a strange noble gas considering that it has electronegativity and has 4 oxidation states. Xenon is a rare, odorless, colorless, tasteless, chemically unreactive gas just like some noble gases. Xenon is a trace gas in the Earth's atmosphere, occurring in 1 part in 20 million. For many years, xenon was thought to be completely inactive. Then, in 1962, English chemist Neil Bartlett made xenon platinofluoride (XePtF 6 ). This inspired chemists to try and make other compounds with Xenon on which they did.