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Lawrencium

Metal radioactivesynthetic
Symbol: Lr
Atomic number: 103
Atomic mass: (262.1098)
Group: Transition Metal
CAS-number: 22537-19-5

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Physical data

Electronic dataThermal dataSteric data
Shells: 2, 8, 18, 32, 32, 9, 2
Orbitals: [Rn] 5f14 6d1 7s2
Electronegativity: --, --
1. Ionization potential: -- 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
254Lr 0 254.096 0 13s α, EC View
256Lr 0 256.099 0 28s α, EC, SF View
257Lr 0 257.1 0 0.65s α, EC View
258Lr 0 258.102 0 4.3s α View

Other info

Name origin:Named in honor of Ernest O. Lawrence, inventor of the cyclotron.
Description:Synthetic radioactive metal.
Discovered by:A.Ghiorso, T.Sikkeland, A.E.Larsh, R.M.Latimer
Year:1961
Place:United States
Sources:Produced by bombarding californium with boron ions.
Use(s):It has no significant commercial applications.