Ununquadium (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.

History

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The discovering of ununquadium in December 1998 was reported in January 1999 by scientists at Dubna (Joint Institute for Nuclear Research) in Russia. 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 200 degrees Celsius.

Synthesis

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Ununquadium can be synthesized by bombarding plutonium 244 targets with calcium 48 heavy ion beams.

Stable Ununquadium

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Ununquadium does not occur naturally on the earth - it is entirely synthesized in laboratories. All isotopes of ununquadium synthesized so far are neutron poor.

See also

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• Island of stability : Ununquadium – Unbinilium – Unbihexium
• Lead
• Eka-thallium — Eka-lead — Eka-bismuth
• Ununtrium – Ununpentium

External links

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• WebElements.com - Uuq
• Apsidium - Ununquadium
• First postcard from the island of nuclear stability
• Second postcard from the island of stability

Chemical elements | Poor metals | Nuclear physics

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