Roentgenium was discovered on 8th December 1994 by scientists at the Heavy Ion Research Laboratory in Darmstadt, Germany.
By G.P. Thomas
18 Dec 2012
Seaborgium was first prepared by Albert Ghiorso and his team at the Lawrence Berkeley Laboratory in Berkeley, California in 1974. They bombarded californium-249 atoms with oxygen-18 ions in a Super-Heavy Ion Linear Accelerator to produce seaborgium.
By G.P. Thomas
17 Dec 2012
Samarium was first observed spectroscopically by a Swiss chemist, Jean Charles Galissard de Marignac in 1853 while working with dydimia. Paul-Émile Lecoq de Boisbaudran, a French chemist first isolated samarium along with didymium from the mineral samarskite in 1879.
Rutherfordium was first discovered by a team of scientists led by Georgy Flerov at the Russian Joint Institute for Nuclear Research (JINR) in Dubna in 1964 while bombarding plutonium atoms with neon.
By G.P. Thomas
17 Dec 2012
Swiss chemists M. Delafontaine and J. L. Soret first observed the absorption spectrum of an unknown element in 1878.
By G.P. Thomas
17 Dec 2012
Dubnium was first discovered in 1967 by the scientist at the Joint Institute for Nuclear Research in Dubna while bombarding americium atoms with neon ions. In the same year, a team from the University of California bombarded californium atoms with nitrogen ions and obtained dubnium-260.
By G.P. Thomas
17 Dec 2012
Darmstadtium was first synthesized by Peter Armbruster, Gottfried Münzenber in 1994 at the Heavy Ion Research Laboratory in Darmstadt. The team produced four atoms of darmstadtium while bombarding lead atoms with nickel atoms in a heavy ion accelerator.
By G.P. Thomas
17 Dec 2012
Californium was discovered in 1950 by a team consisting of Glenn Seaborg, Albert Ghiorso, Kenneth Street and Stanley G. Thompson at the University of California
By G.P. Thomas
17 Dec 2012
Two German scientists Armbruster and Münzenberg unambiguously identified bohrium in 1981 at the Gesellschaft für Schwerionenforschung while bombarding 209Bi with a beam of 54Cr ions using the universal linear accelerator.
By G.P. Thomas
17 Dec 2012
Ununpentium was discovered in 2003 by a group of scientists working at the Joint Institute for Nuclear Research in Dubna, Russia, and Lawrence Livermore National Laboratory (LLNL), California. In 2015, the International Union of Pure and Applied Chemistry (IUPAC) recognized the discovery of the element, which was renamed moscovium, referring to Moscow Oblast in Russia.
By G.P. Thomas
17 Dec 2012