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Elemental Periodic Table

erbium

Atomic number: 68
Atomic weight: 167.26
Symbol: Er
Group number: (lanthanide)
Electronic configuration: [Xe].4f12.6s2


Physical data

Standard state: solid at 298 K
Colour: silvery white
Density of solid at ambient temperature/kg m-3: 9066
Molar volume/cm3: 18.46


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