Periodic Table of the Elements

dubnium	Atomic number: 105 Atomic weight: 262 Symbol: Db Group number: 5 Electronic configuration: [Rn].5f¹⁴.6d³.7s² (a guess based upon that of tantalum)
Description General information Physical data Radii Electronegativities Solid state structure Temperatures Enthalpies Ionization Enthalpies Isotopes Further information

Description

General information

Discoveror: Workers at the Nuclear Institute at Dubna, and the University of California, Berkeley, USA.
Date discovered: 1967
Discovered at: USSR, United States
Meaning of name: The origin of the name dubnium is the Joint Nuclear Institute at Dubna", an institute heavily involved in the search for heavy elements

Physical data

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

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/Db.html