|Boiling Point: unknown
Melting Point: unknown
Electrons Energy Level: unknown
Isotopes: 5 + None Stable
Heat of Vaporization: unknown
Heat of Fusion: unknown
Specific Heat: unknown
Atomic Radius: unknown
Ionic Radius: unknown
eka-Lead, is the temporary name of a radioactive chemical element in the periodic table
that has the temporary symbol Uuq and has the atomic number 114.
The discovery of ununquadium in December 1998 was reported in January 1999 by scientists at the Joint Insitute for Nuclear Research in Dubna, Russia.
They bombarded atoms of Plutonium with ions of Calcium. This produced a single atom of Ununquadium-289, an isotope with a half-life of about 21 seconds. Ununquadium's most stable isotope, Ununquadium-289, has a half-life of about 21 seconds. It decays into Ununbium-285 through alpha decay.
The same team produced another isotope of Uuq three months later and confirmed the synthesis in 2004 and 2006.
In 2004 in the Joint Institute for Nuclear Research the synthesis of this element was confirmed by another method (the chemical identifying on final products of decay of element).
Ununquadium is a temporary IUPAC systematic element name. Some have termed it eka-lead, as its properties are conjectured to be similar to those of Lead. It is expected to be a soft, dense metal that tarnishes in air, with a melting point around 200oCelsius.
Ununquadium can be synthesized by bombarding 244Pu targets with 48Ca heavy ion beams.
The results of calculations suggest that Ununquadium will not form a Tetrafluoride UuqF4, but could be isolated as a water-soluble Difluoride UuqF2.
Synthesis of Isotope 298
Manufacturing Ununquadium-298 would be very difficult, because nuclei summing to 114 protons and 184 neutrons are not available in weighable quantities.
However it may be possible to generate the isotope 298 of Element 114, if nuclear transfer reactions can be achieved. One of these reactions may be:
204Hg + 136Xe 298Uuq + 40Ca + 2n
According to the Island of Stability Theory, some nuclides around the area of 114 protons and 184 neutrons (i.e. isotope Uuq-298) can be expected to be relatively stable in comparison to the surrounding nuclides. Ununquadium does not occur naturally on the earth, so it is entirely synthesized in laboratories. All isotopes of ununquadium synthesized so far are neutron-poor. This means that they contain significantly fewer neutrons than 184, which is one of the magic number of neutrons that is believed to make the isotope more stable. Neutron-poor also indicates that the isotopes decay either by spontaneous fission producing a variety of radionuclides, positron emission or Electron capture to yield element ununtrium.