Krypton is a chemical element with the symbol Kr and atomic number 36.
A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere, is isolated by fractionating liquefied air, and is often used with other rare gases in fluorescent lamps.
Krypton is inert for most practical purposes but it is known to form compounds with fluorine.
Krypton can also form clathrates with water when atoms of it are trapped in a lattice of the water molecules.
Krypton is a noble gas due to its very low chemical reactivity.
It is one of the products of uranium fission.
Solidified krypton is white and crystalline with a face-centered cubic crystal structure which is a common property of all "rare gases".
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