68Er

Erbium

Lanthanide

Erbium (Er) is element 68, a lanthanide, in period 6 of the periodic table. Its standard atomic weight is 167.259, it melts at 1529 °C and boils at 2868 °C. Discovered by Carl Gustaf Mosander, 1843.

Atomic Number68

SymbolEr

NameErbium

Atomic Weight167.259 u

CategoryLanthanide

Period6

Melting Point1529 °C

Boiling Point2868 °C

Density9.066 g/cm³

Electron Config[Xe] 4f12 6s2

Discovered ByCarl Gustaf Mosander, 1843

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