kryp·ton /ˈkrɪpˌtɑn/
氪
kryp·ton /ˈkrɪpˌtɑn/ 名詞
氪
Kryp·ton n. Chem. An inert gaseous element of the argon (noble gas) group, of atomic number 36, occurring in air to the extent of about one volume in a million. It was discovered by Ramsay and Travers in 1898. Boiling point, -152.3° C.; melting point, -156.6° C.; symbol, Kr; atomic weight, 83.8.
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krypton
n : a colorless element that is one of the six inert gasses;
occurs in trace amounts in air [syn: Kr, atomic number
36]
krypton
Symbol: Kr
Atomic number: 36
Atomic weight: 83.80
Colorless gaseous element, belongs to the noble gases. Occurs in the air,
0.0001% by volume. It can be extracted from liquid air by fractional
distillation. Generally not isolated, but used with other inert gases in
fluorescent lamps. Five natural isotopes, and five radioactive isotopes.
Kr-85, the most stable radioactive isotope, has a half-life of 10.76
years and is produced in fission reactors. Practically inert, though known
to form compounds with fluorine.