bers 78, 80, 82, 83, 84) and there are
Üve radioactive isotopes (76, 77, 79,
81, 85). Krypton–85 (half-life 10.76
years) is produced in Üssion reactors
and it has been suggested that an
equilibrium amount will eventually
occur in the atmosphere. The element is practically inert and forms
very few compounds (certain
Ûuorides, such as KrF 2 , have been reported).
A
• Information from the WebElements site
Kupfer nickel A naturally occurring form of nickel arsenide, NiAs; an
important ore of nickel.
kurchatovium See transactinide
elements.
Kupfer nickel
310
k
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