ChemGlobe

Mendelevium

Metal radioactivesynthetic
Symbol: Md
Atomic number: 101
Atomic mass: (258.0984)
Group: Actinide
CAS-number: 7440-11-1

Deutsch
Français
Español
Physical data
Isotopes
Other info
Navigation
Tm
Thulium
Fm Fermium To Periodic Table NobeliumNo
disabled arrow

Go to element

Physical data

Electronic dataThermal dataSteric data
Shells: 2, 8, 18, 32, 31, 8, 2
Orbitals: [Rn] 5f13 7s2
Electronegativity: --, 1.2
1. Ionization potential: 6.58 eV
2. Ionization potential: -- eV
3. Ionization potential: -- eV
Oxidation states: 3
Electrical conductivity: --
Melting point: -- °C
Boiling point: -- °C
Specific heat: -- J/gK
Heat of fusion: -- kJ/mol
Heat of vaporization: -- kJ/mol
Thermal conductivity: 0.1 W/cmK
Atomic radius: -- Å
Ionic radius: -- Å
Covalent radius: -- Å
Atomic volume: -- cm³/mol
Density (293 K): -- g/cm³
Crystal structure: --

Isotopes

NuclideAbundance [%]MassSpinHalflifeDecay modeDecay tree
250Md 0 250 0 50s EC, α View
252Md 0 252.087 0 2m EC, α View
253Md 0 253.087 ? ? ? View
254Md 0 254 0 10m EC View
255Md 0 255.091 7/2 27m EC, α View
258Md 0 258.099 8 51.5d α View

Other info

Name origin:Named in honor of the scientist Dmitri Ivanovitch Mendeleyev, who devised the periodic table.
Description:Synthetic radioactive metal.
Discovered by:G.T.Seaborg, S.G.Tompson, A.Ghiorso, K.Street Jr.
Year:1955
Place:United States
Sources:Made by bombarding einsteinium with helium ions.
Use(s):It has no significant commercial applications.