Mendelevium: the essentials
- Name: mendelevium
- Symbol: Md
- Atomic number: 101
- Relative atomic mass (Ar): [ 258 ] (longest lived isotope)
- Standard state: presumably a solid at 298 K
- Appearance: unknown, but probably metallic and silvery white or grey in appearance
- Classification: Metallic
- Group in periodic table:
- Group name: Actinoid
- Period in periodic table: 7 (actinoid)
- Block in periodic table: f
- Shell structure: 18.104.22.168.31.8.2
- CAS Registry: 7440-11-1
Mendelevium atoms have 101 electrons and the shell structure is 22.214.171.124.31.8.2. The ground state electronic configuration of neutral mendelevium is [Rn].5f13.7s2 and the term symbol of mendelevium is 2F7/2.
Mendelevium is a radioactive rare earth metal named after Dmitri Mendeleev, father of the Periodic Table.
Mendelevium: physical properties
- Density of solid: (no data) kg m-3
- Molar volume: (no data) cm3
- Thermal conductivity: 10 (estimate) W m‑1 K‑1
Mendelevium: heat properties
- Melting point: about 1100 [827 °C (1521 °F)] K
- Boiling point: (no data) K
- Enthalpy of fusion: 20.5 kJ mol-1
Mendelevium: atom sizes
- Atomic radius (empirical): (no data) pm
- Molecular single bond covalent radius: 173 (coordination number 3) ppm
- van der Waals radius: (no data) ppm
- Pauling electronegativity: 1.3 (Pauling units)
- Allred Rochow electronegativity: 1.2 (Pauling units)
- Mulliken-Jaffe electronegativity: (no data)
Mendelevium: orbital properties
- First ionisation energy: 635 (inferred) kJ mol‑1
- Second ionisation energy: 1200 kJ mol‑1
- Third ionisation energy: 2340 kJ mol‑1
- Universe: (no data) ppb by weight
- Crustal rocks: (no data) ppb by weight
- Human: (no data) ppb by weight
Mendelevium: crystal structure
Mendelevium: biological data
- Human abundance by weight: (no data) ppb by weight
Mendelevium has no biological role.
Reactions of mendelevium as the element with air, water, halogens, acids, and bases where known.
Mendelevium: binary compounds
Binary compounds with halogens (known as halides), oxygen (known as oxides), hydrogen (known as hydrides), and other compounds of mendelevium where known.
Mendelevium: compound properties
Bond strengths; lattice energies of mendelevium halides, hydrides, oxides (where known); and reduction potentials where known.
Mendelevium: historyMendelevium was discovered by Glenn T. Seaborg, Albert Ghiorso, Bernard Harvey, Gregory Choppin, Stanley G. Thompson in 1955 at USA. Origin of name: named after Dimitri "Mendeleev", the Russian chemist who contributed so much to the development of the periodic table.
Isolation: coming soon!