Discovery date : 1999
Discovered by: Scientists from the Joint Institute for Nuclear Research in Dubna,
Russia and the Lawrence Livermore National Laboratory, California, USA.
Origin of the name: Named after the Russian physicist Georgy Flerov
who founded the Joint Institute for Nuclear Research where the element was discovered.
Allotropes :
~>FLEROVIUM is a superheavy artificial chemical element with symbol Fl and atomic number 114. It is an extremely radioactive synthetic element.
| FACT BOX | |||
| Group | 14 | Melting point | Unknown |
| Period | 7 | Boiling point | Unknown |
| Block | p | Density (g cm−3) | Unknown |
| Atomic number | 114 | Relative atomic mass | [289] |
| State at 20°C | Solid | Key isotopes | 289Fl |
| Electron configuration | [Rn] 5f146d107s27p2 | CAS number | 54085-16-4 |
| ChemSpider ID | - | ChemSpider is a free chemical structure database | |
There are four known isotopes of flerovium with mass numbers 286-289. The longest-lived is 289 and it has a half-life of 2.6 seconds. Nuclear theory suggests that isotope 298, with 184 neutrons, should be much more stable but that has yet to be made.
Despite several attempts to make element 114, it was only in 1998 that a team led by Yuri Oganessian and Vladimir Utyonkov at the Joint Institute for Nuclear Research (JINR) in Russia produced it by bombarding plutonium with calcium. It needed 5 billion billion (5 x 1018) atoms of calcium to be fired at the target to produce a single atom of flerovium, in an experiment lasting 40 days. A few more two atoms were produced the following year.