第一百一十四號元素
Ununquadium (IPA: /ˌjuːˌnʌnˈkwɒdiəm/), or 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
The discovery of ununquadium in December 1998 was reported in January 1999 by scientists at Dubna (Joint Institute for Nuclear Research) in Russia.【1】 The same team produced another isotope of Uuq three months later【2】 and confirmed the synthesis in 2004 and2006.
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
Ununquadium can be synthesized by bombarding plutonium 244 targets with calcium 48 heavy ion beams.
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
【citation needed】
One of these reactions may be: 204Hg + 136Xe → 298Unq + 40Ca + 2n化學性質
Uuq是一種人工合成的放射性化學元素，它的化學符號是Uuq，它的原子序數是114，屬於弱金屬之一。Uuq在1998年合成於杜布納，用鈣轟擊鈽獲得289Uuq，是迄今為止已知的最穩定同位素，半衰期達30秒，相比之下，是超鈾元素中異乎尋常的長壽核素，似乎正在證實穩定島理論的預言。
