WebElements

Periodic Table

ununbium

Atomic number: 112
Atomic weight: 277
Symbol: Uub
Group number: 12
Electronic configuration: [Rn].5f14.6d10.7s2 (a guess based upon that of mercury)

Description

Element 112 was discovered on 9th February 1996 at 22:37 at the GSI in Darmstadt, Germany. Further information on element 112 is here (outside WebElements) and in a press release (outside WebElements). The interested reader should consult the on-line version of The Wonderful World of Atoms and Nuclei for a fascinating insight into research on "super-heavy" atoms

General information

Discoveror: S. Hofmann, V. Ninov, F. P. Hessberger, P. Armbruster, H. Folger, G. Münzenberg, and others
Date discovered: 1996
Discovered at: Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany.
Meaning of name: Temporary IUPAC nomenclature

Physical data

Standard state: unknown but presumably a solid at 298 K
Colour:

Isotopes

This section gives some data for naturally occurring isotopes.
Nominal mass Accurate mass % natural abundance
nil

Further Information

Copyright 1997 Mark Winter
Department of Chemistry at the University of Sheffield, Sheffield S3 7HF, England.

The current version of this document is at http://www.shef.ac.uk/~chem/web-elements-I/Uub.html