57   La   138.905500 Lanthanum

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Name: Lanthanum
Symbol: La
Atomic Number: 57
AtomicWeight: 138.905500
Family: rare earth elements
CAS RN: 7439-91-0
Description: A is silvery white, malleable, ductile, and soft rare-earth metal
State (25 ° C): Solid
Oxidation states: +3
Valence Electrons: 5d¹6s²

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