Periodic Table of the Elements

meitnerium	Atomic number: 109 Atomic weight: 266 Symbol: Mt Group number: 9 Electronic configuration: [Rn].5f¹⁴.6d⁷.7s² (a guess based upon that of iridium)
Description General information Physical data Radii Electronegativities Solid state structure Temperatures Enthalpies Ionization Enthalpies Isotopes Further information

Description

Element 109, meitnerium, is a synthetic element that is not present in the environment at all. There is no dispute concerning the name meitnerium for element 109.
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: Peter Armbruster, Gottfried Münzenber and their co-workers.
Date discovered: 1982
Discovered at: Gesellschaft für Schwerionenforschung (GSI) in Darmstadt, Germany.
Meaning of name: Named after Lise "Meitner", the Austrian physicist

Physical data

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

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/Mt.html