WebElements

Periodic Table

mendelevium

Atomic number: 101
Atomic weight: 258
Symbol: Md
Group number: (actinide)
Electronic configuration: [Rn].5f13.7s2

Description

Mendelevium is a radioactive rare earth metal named after Dmitri Mendeleev, father of the Periodic Table.

General information

Discoveror: Glenn T. Seaborg, Albert Ghiorso, Bernard Harvey, Gregory Choppin, Stanley G. Thompson
Date discovered: 1955
Discovered at: USA
Meaning of name: Named after Dimitri "Mendeleev", the Russian chemist who contributed so much to the development of the periodic table

Physical data

Standard state: unknown but presumably a solid at 298 K
Colour:
1st635

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/Md.html