Actinium

Actinium
By: Lilian

** Atomic Number: ** 89

 ** Protons: ** 89


 * Electrons: ** 138


 * Neutrons: ** 89


 * Average Atomic Mass: ** 227

No stable isotopes 
 * Isotopes: **


 * Discovery: ** Actinium was discovered by Andre Debierne in 1899 and later on by F. Giesel in 1902, both discovered it while working on separation techniques for earth oxides.
 * Name: ** came from the Greek word "aktinos" which means "ray"


 * Uses: ** used for thermal electric power

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 * Interesting Facts ** :
 *  Actinium metal tarnishes slowly in air and burns to form actinium (III) oxide, Ac2O3
 * Actinium glows blue when in the dark.
 * Video: ** 

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