Actinium

Actinium is a very rare radioactive chemical element. It is silvery-white and glows blue in the dark.

Actinium
Properties
Atomic symbol	Ac
Atomic number	89
Classification	Transition Metal
Atomic mass	227.0 amu
Other Information
Date of discovery	1899
Name of discoverer	André-Louis Debierne
Name origin	From the Greek aktinos.
Uses	Unknown
Obtained from	From Radium, by neutron irradiation.