Periodic Table of the Elements

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 General information Physical data Radii Electronegativities Solid state structure Temperatures Enthalpies Ionization Enthalpies Isotopes Further information

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

Nominal mass	Accurate mass	% natural abundance
		nil

Further Information

Additional information about WebElements 1.2.2
This is a licensed copy (here is the full list) of WebElements 1.2.2 and contains a subset of the material contained within the main version of WebElements (version 2)
For further information please try WebElements version 2
Sheffield Chemdex: perhaps the largest internet chemistry directory
Sheffield Chemputer: interactive chemistry calculators on the WWW

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

ununbium

Description

General information

Physical data

Isotopes

Further Information