Artificial radioactive element properties unknown	memory peg
	1999 Ю.Ц. Оганесян (Yu.Ts. Oganessian) and co-workers, Dubna, Russia
	un-un-quad-ium = 1-1-4-ium

First prepared in 1999 by

Юрий Цолакович Оганесян (Yuri Tsolakovich Oganessian), Alexander Vladimirovich Yeremin, Andre Georgievich Popeko, Sergey L. Bogomolov, German Vladimirovich Buklanov, M. L. Chelnokov, Victor Ivanovich Chepigin, Boris N. Gikal, Vladimir A. Gorshkov, Georgy G. Gulbekian, М.Г. Иткис (Michael Grigorievich Itkis), Anatoly Petrovich Kabachenko, Anton Yurievich Lavrentiev, Oleg Nikolaevich Malyshev, Jozef Rohach, Roman Nikolaevich Sagaidak	Лаборатория ядерных реакций им. Г.Н. Флерова / Flerov Laboratory of Nuclear Reactions, FLNR ОИЯИ / JINR, Дубна (Dubna), Russia
Sigurd Hofmann	Gesellschaft für Schwerionenforschung, Darmstadt, Germany
S. Saro	Katedra jadrovej fyziky, Univerzita Komenského, Bratislava, Slovakia
G. Giardina	Dipartimento di Fisica dell'Universita di Messina, Messina, Italy
K. Morita	Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama, Japan

at the Лаборатория ядерных реакций им. Г.Н. Флерова / Flerov Laboratory of Nuclear Reactions, FLNR - ОИЯИ / JINR, Дубна (Dubna), Russia.

The element does not have a name yet, therefore the systematic IUPAC name is used (system explained at Ununoctium).

Elements synthesized at the Лаборатория ядерных реакций им. Г.Н. Флерова (Flerov Laboratory of Nuclear Reactions, FLNR) of the Объединенный Институт Ядерных Исследований, ОИЯИ (Joint Institute of Nuclear Research, JINR).

• 102 Nobelium No in 1963
• 103 Lawrencium Lr in 1965
• 104 Rutherfordium Rf in 1964
• 105 Dubnium Db in 1967
• 106 Seaborgium Sg in 1974
• 107 Bohrium Bh in 1982
• 108 Hassium Hs in 1984
• Element 110 in 1989
• Element 112 in 1998
• Element 114 in 1999
• Element 116 in 2000
• Element 118 in 2002

Abstract from JINR News, 4 March 1999

At the Flerov Laboratory of Nuclear Reactions, a group of scientists headed by Professor Yu.Ts.Oganessian in collaboration with the colleagues from the Lawrence Livermore National Laboratory (USA) synthesized a new long-lived (30s) superheavy element of the Periodic Table with atomic number 114 and mass 289.

This discovery sums up many-year efforts of experimental physicists from Russia, USA, and Germany to search for a stability island of superheavy elements predicted and discussed by theoretical physicists in various countries for the past 35 years.

The discovery of the stability island of superheavy elements has become possible owing to the unique parameters of the experimental facility, which records extremely rare events of formation and decay of nuclei, and the record intensities of the accelerated ⁴⁸Ca ion beams.

Further reading (information)

• Yu.Ts. Oganessian et al., "Synthesis of nuclei of the superheavy element 114 in reactions induced by ⁴⁸Ca." Nature 400 (15 July 1999), p. 242-245.
• "A New Element Synthesized" JINR News 1 (4 March 1999).
• "114-й элемент: анатомия научного поиска" (114 element: anatomy of a scientific search), Dubna: Science, Cooperation, Progress, Numbers 16-17 (3455-3456) (30 April 1999) (English abstract or Russian version)