Electronic data		Thermal data		Steric 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: --

Nuclide	Abundance [%]	Mass	Spin	Halflife	Decay mode	Decay tree
254Lr	0	254.096	0	13s	,EC	View
256Lr	0	256.099	0	28s	,EC,SF	View
257Lr	0	257.1	0	0.65s	,EC	View
258Lr	0	258.102	0	4.3s		View

Legend

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.