The element mendelevium is named after the chemist Dmitri Mendeleev, who invented the periodic table. Mendelevium is produced in very small quantities by colliding parts of helium atoms into einsteinium atoms in a particle accelerator.
Summary of properties (Md)
| Atomic weight | [258] |
| Discoverer (year) | Seaborg, Glenn T. (1955) |
| Natural form | metallic solid (-) |
| Electron configuration | [Rn] 5f 13 s2 |
| Melting point (ºC) | |
| Boiling point (ºC) | |
| Abundance in earth's crust (ppm) | synthetic |
| Isotope (abundance) | |
| Density g/cm3 | |
| Van der Waals radius (pm) | 246 |
| Covalent radius (pm) | 173 |
| Electronegativity (Pauling) | 1.3 |
| 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 | +3, +2 |
| Electron affinity (eV) | |
| 1st Ionization potential (eV) | 6.5800 |
