Flerovium (Fl)
“Named for the Flerov Laboratory at Dubna — whose founder Georgy Flyorov discovered spontaneous fission and wrote the 1942 letter that launched the Soviet atomic bomb project.”
How its electrons are arranged
Computed from the aufbau principle, with known real-world exceptions applied automatically.
The notes
Characteristics
- A wholly synthetic superheavy metal: every flerovium atom ever made was assembled in a particle accelerator, a few atoms per experiment.
- Even the longest-lived isotopes vanish within seconds — Fl-289 lasts about two seconds, and the champion, Fl-290, about twenty.
- Relativistic effects clamp its 7s and 7p₁/₂ electrons tightly, so flerovium is predicted to be the most “noble”, least reactive metal of Group 14 — lazier even than lead.
- Gas-phase chemistry on a few atoms in 2007–08 showed it to be far more volatile than lead, settling onto gold only at much lower temperatures — a sign of oddly weak metallic bonding.
No human eye has ever seen flerovium — it has existed only as scattered single atoms born in accelerators. Calculations predict a soft, silvery, remarkably volatile Group 14 metal whose atoms are so weakly bound that they barely stick even to gold.
Where you meet it
✦ Uses
- Testing the decades-old prediction that proton number 114 is a nuclear “magic number”: every flerovium isotope’s measured half-life refines the map of the predicted island of stability.
- Probing how relativity bends Group 14 chemistry — its unusual volatility on gold surfaces is direct evidence that the periodic law flexes at superheavy masses.
- Its alpha-decay energies act as calibration signposts, letting laboratories confirm that their detectors are reading new superheavy nuclei correctly.
- Comparing measured decay chains with nuclear shell-model calculations tells theorists where the next magic numbers beyond 114 might hide.
◍ Everyday examples
- Flerovium and livermorium are the only two elements named directly after research laboratories — quiz programmes love asking for the pair.
- When flerovium was officially named in 2012, periodic-table charts everywhere — including those in Bangladeshi classrooms — gained a permanent Fl box in the bottom row.
- NCTB physics teaches nuclear fission; the element’s namesake Georgy Flyorov co-discovered the spontaneous form of that very process.
History & name
In December 1998 the Flerov Laboratory of Nuclear Reactions in Dubna, Russia — a team led by Yuri Oganessian working with chemists from Lawrence Livermore National Laboratory in California — bombarded a plutonium-244 target with calcium-48 ions and captured the alpha-decay chain of a single atom of Fl-289, reported in Nature the following year. Independent confirmation took nearly a decade, and IUPAC finally credited the Dubna–Livermore collaboration in 2011. In 2012 the element was officially named flerovium — honouring the Flerov Laboratory and its founder Georgy Flyorov, who co-discovered spontaneous fission in 1940 and whose alarmed 1942 letter to Stalin started the Soviet atomic bomb project.