Bohuslav Brauner, a Czech chemist predicted the existence of promethium in 1902. Although several groups claimed to have discovered the element, none of them were able to confirm their discovery.
By G.P. Thomas
17 Dec 2012
In 1841, Carl Mosander separated two elements didymium and lanthanum from cerium. Although didymium was considered as an element for several years, scientists suspected whether didymium has a mixture of elements.
By G.P. Thomas
17 Dec 2012
Polonium was discovered by Marie and Pierre Curie in 1898 while examining the radioactivity in pitchblende.
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
In 1984, Peter Armbruster and Gottfried Münzenber along with their co-workers first produced hassium while performing an experiment at Gesellschaft für Schwerionenforschung in Germany.
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
Carl Gustaf Mosander, a Swedish scientist, discovered terbium in 1843. Terbium was available as an impurity in yttria. Following this discovery the pure form of this element was first prepared by Jean-Charles-Galissard de Marignac, a French chemist, in 1886.
By G.P. Thomas
17 Dec 2012