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Elemental Periodic Table

lanthanum

Atomic number: 57
Atomic weight: 138.9055
Symbol: La
Group number: 3
Electronic configuration: [Xe].5d1.6s2


Physical data

Standard state: solid at 298 K
Colour: silvery white
Density of solid at ambient temperature/kg m-3: 6146
Molar volume/cm3: 22.39


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