WebElements

Periodic Table

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

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

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/Db.html