<Tr> <Td_colspan="2"> <Ul> <Li> view </Li> <Li> talk </Li> <Li> </Li> </Ul> references in Wikidata </Td> </Tr> <Ul> <Li> view </Li> <Li> talk </Li> <Li> </Li> </Ul> <P> Krypton (from Greek: κρυπτός kryptos "the hidden one") is a chemical element with symbol Kr and atomic number 36 . It is a member of group 18 (noble gases) elements . A colorless, odorless, tasteless noble gas, krypton occurs in trace amounts in the atmosphere and is often used with other rare gases in fluorescent lamps . With rare exceptions, krypton is chemically inert . </P> <P> Krypton, like the other noble gases, is used in lighting and photography . Krypton light has many spectral lines, and krypton plasma is useful in bright, high - powered gas lasers (krypton ion and excimer lasers), each of which resonates and amplifies a single spectral line . Krypton fluoride also makes a useful laser . From 1960 to 1983, the official length of a meter was defined by the 605 nm wavelength of the orange spectral line of krypton - 86, because of the high power and relative ease of operation of krypton discharge tubes . </P>

Where is krypton located on the periodic table
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