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Atomic symbol - Kr
Atomic weight - 83.80
Atomic number - 36
Electron configuration - 2-8-18-8
Oxidation states - 0
State of matter - gas
Noble gas
Discovered in 1898 by Sir William Ramsay and Morris W. Travers
Boils at -152.3 .C, melts at -156.6 .C

Having an octet structure, it would seem that krypton would not combine with
other elements. But in the 1960's, it was discovered that it would combine
with fluorine. Molecules of krypton consist of only one atom. About 20 radio-
active isotopes have been created by nuclear fission of urainium and other
elements. As a gas it is used in certain florescent lamps and special flash-
lamps used in high-speed photography.

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