Flerovium (Fl)

Isotopes of Flerovium

Isotope Atomic Mass Half-life Mode of Decay
Fl-285 285 0.00058 seconds α to Cn-281
Fl-286 286 0.10 seconds SF
Fl-287 287 5.00 seconds α to Cn-283
Fl-288 288 6.00 seconds α to Cn-284
Fl-289 289 21.00 seconds α to Cn-285


Flerovium was discovered by workers in 1998 at the Nuclear Institute in Dubna, Russia. It was named for the Flerov Laboratory of Nuclear Reactions, where “element 114” was synthesized. The lab, in turn, was named in honor of Georgiy N. Flerov, an eminent physicist who discovered the spontaneous fission of uranium. He was also the founder of the Joint Institute for Nuclear Research.

Recent research results show that flerovium's reaction with gold is similar to that of copernicium, showing that it is a very volatile element that may even be gaseous at standard temperature and pressure, and that while it would show metallic properties, consistent with its being the heavier homologue of lead, it would also be the least reactive metal in group 14.  

Properties of Flerovium

Name Flerovium 
Symbol  Fl 
Atomic number  114 
Atomic weight  [289] 
Standard state  Presumably a solid at 298 °K 
CAS Registry ID  54085-16-4 
Group in periodic table  14 
Group name  None 
Period in periodic table 
Block in periodic table  p-block 
Color  Unknown, but probably metallic and silvery white or gray in appearance 
Classification  Metallic 
Melting point  67 °C (predicted) 
Boiling point  147 °C 
Heat of vaporization  38 (predicted) kJ·mol-1 
Density of solid  14 g/cm3 (predicted) 
Electron configuration  [Rn]5f146d107s27p2 
Oxidation states  0, +2, +4 

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