Researchers think that meitnerium may be the densest of all the elements. It is very unstable, and even the atoms of its most stable isotope, or form, split apart in a matter of seconds. Meitnerium is named in honor of physicist Lise Meitner.

Summary of properties (Mt)

Atomic weight[278]
Discoverer (year)Armbruster, Paula & Muenzenberg, Dr. Gottfried (1982)
Natural formmetallic solid (-)
Electron configuration[Rn] 7s2 514 6d7
Melting point (ºC)
Boiling point (ºC)
Abundance in earth's crust (ppm)synthetic
Isotope (abundance)
Density g/cm3
Van der Waals radius (pm)
Covalent radius (pm)129
Electronegativity (Pauling)
Vaporization enthalpy (kJ/mol)-
Enthalpy of fusion (kJ/mol)-
Specific heat capacity (J/g·K) at 25ºC and 1 atm-
Thermal conductivity (W/cm·K) at 25ºC and 1 atm-
Oxidation state
Electron affinity (eV)
1st Ionization potential (eV)

Back to the Periodic Table of the Elements.