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Mendelevium

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

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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:Benannt nach Wissenschaftler Dmitri Ivanovitch Mendeleyev, der das Periodensystem entworfen hat.
Description:Synthetisches, radioaktives Metall.
Discovered by:G.T.Seaborg, S.G.Tompson, A.Ghiorso, K.Street Jr.
Year:1955
Place:USA
Sources:Hergestellt durch Bombardierung von Einsteinium mit Helium Ionen.
Use(s):Keine signifikante kommerzielle Nutzung.