Definition	from 'aktinos' or ray. second rarest of all the elements.it has a half life of 22 years and decomposes into francium and helium.
Discovery	1899 by andre loius debieme of france
Uses	neutron production, source of alpha rays
Group of Elements	Actinides(Solid)
Atomic Weight	(227)
Oxidation State	+3
Melting Point	1050
Boiling Point	3200
Density	-- g/cm3
Electronegativity	1.1