| slovo | definícia |
ununquadium
(wn) | ununquadium
n 1: a radioactive transuranic element [syn: ununquadium,
Uuq, element 114, atomic number 114] |
ununquadium
(elements) | ununquadium
Symbol: Uuq
Atomic number: 114
Atmic weight: 289
Ununquadium is the temporary name of a radioactive chemical element with
the temporary symbol Uuq and atomic number 114.
About 80 decays of atoms of ununquadium have been observed to date,
50 directly and 30 from the decay of the heavier elements ununhexium
and ununoctium. All decays have been assigned to the four neighbouring
isotopes with mass numbers 286-289. The longest-lived isotope currently
known is 289114 with a half-life of ~2.6 s, although there is evidence
for an isomer, 289b114, with a half-life of ~66 s, that would be one of
the longest-lived nuclei in the superheavy element region.
Recent chemistry experiments have strongly indicated that element 114
possesses non-'eka'-lead properties and appears to behave as the first
superheavy element that portrays noble-gas-like properties due to
relativistic effects.
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