What is the history of unnilpentium?

Answer 1

Temporary name of the chemical element with atomic number 105. It was first synthesized and identified by A. Giorso, M. J. Nurmia, J. A. Harries, K. A. Y. Eskola and P. Escola at Lawrence Radiation Laboratory in Berkeley, California. They proposed the name hahnium (symbol, Ha), honoring the German physicist Otto Hahn. A conflicting claim from Dubna urged the name nielsbohrium. In August 1994 a panel of the International Union of Pure and Applied Chemistry (IUPAC) recommended it be called joliotium, for the French physicist Frederic Joliot-Curie.

In 1997, the IUPAC Commission on Nomenclature of Inorganic Chemistry recommended the name dubnium (symbol, Db), in honor of Dubna, commenting

Answer 2

Unnilpentium is the placeholder name for the element with atomic number 105 on the Periodic Table. It was first synthesized in 1969 by a research team led by Albert Ghiorso at the Lawrence Berkeley National Laboratory in California. The element was later officially named Dubnium (Db) after the Joint Institute for Nuclear Research in Dubna, Russia, where much of the research on superheavy elements takes place.