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 form | metallic solid (-) |
| Electron configuration | [Rn] 7s2 5f 14 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) |
