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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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