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Element 103 - Lawrencium (Lr)

After Ernest O. Lawrence. Discovered in 1961 at Lawrence Radiation Laboratories, lawrencium was made by bombardment of californium with boron in a chamber fitted with a copper conveyer; the new atoms, one at a time, were carried to a radiation detector for identification.

Properties
Atomic Number:	103
Atomic Weight:	(260)
Electron Configuration (at ground state):	1s²2s²2p⁶3s²3p⁶3d¹⁰4s²4p⁶4d¹⁰5s²5p⁶4f¹⁴5d¹⁰5f¹⁴6s²6p⁶6d¹7s²
Oxidation States (Bold most stable):	+3
Melting Point (K):	1900
Mass Number (Bold naturally occurring) -- Half-Life -- Disintigration Type:	260 -- 3.0 minutes -- alpha particle emission
Electronegativity (Pauling's):	1.3
Thermal Conductivity (at 300K -- W m^-1 K^-1):	10

Element 103 - Lawrencium (Lr)

Properties