89   Ac   227.000000 Actinium

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Name: Actinium
Symbol: Ac
Atomic Number: 89
AtomicWeight: 227.000000
Family: rare earth elements
CAS RN: 7440-34-8
Description: Silvery, very radioactive, chemical behavior similar to rare earth metals
State (25 ° C): Solid
Oxidation states: +3
Valence Electrons: 6d¹7s²

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