Ununquadium = Flerovium and Ununhexium = Moscovium?

In June last year it was reported that element 114 – with the temporary name ununquadium – had been manufactured in the lab.

Periodic table gets bigger: Element 114 Ununquadium

Now a a joint working party of the International Union of Pure and Applied Chemistry (IUPAC) and the International Union of Pure and Applied Physics (IUPAP) have concluded that elements 114 and 116 have fulfilled criteria for official inclusion in the periodic table.

Discovery of the elements with atomic numbers greater than or equal to 113

doi:10.1351/PAC-REP-10-05-01

Abstract: The IUPAC/IUPAP Joint Working Party (JWP) on the priority of claims to the discovery of new elements 113–116 and 118 has reviewed the relevant literature pertaining to several claims. In accordance with the criteria for the discovery of elements previously established by the 1992 IUPAC/IUPAP Transfermium Working Group (TWG), and reinforced in subsequent IUPAC/IUPAP JWP discussions, it was determined that the Dubna-Livermore collaborations share in the fulfillment of those criteria both for elements Z = 114 and 116. A synopsis of experiments and related efforts is presented.

The discovery of both elements has been credited to a collaborative team based at the Joint Institute for Nuclear Research in Dubna, Russia, and Lawrence Livermore National Laboratory in California, US. The collaborative parties have proposed the name flerovium for 114, after Soviet scientist Georgy Flyorov, and moscovium for 116, after the region in Russia.

In recent years, there have been several claims by laboratories for the discovery of elements at 113, 114, 115, 116 and 118 in the periodic table. The working party concluded that elements 114 and 116 now fulfilled criteria for official inclusion in the table.

Periodic Table

Periodic Table with the Unun series: image BBC

The two new elements are radioactive and only exist for less than a second before decaying into lighter atoms. Element 116 will quickly decay into 114, and 114 transforms into the slightly lighter copernicium as it sheds its alpha particles.

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