Erbium (Er) in the periodic table — PeriodicTable

Erbium (Er) in the periodic tableErbium is element 68, a lanthanoid of the f block, in period 6. Its ground-state configuration is [Xe] 4f12 6s2, and it usually shows the oxidation states 0, 3.It was discovered in 1842, by Mosander.Name origin: Ytterby, Sweden. Blank rows are columns the sheet does not measure for this element.

Property

Value

Unit

Atomic weight

167.259

Da

Electronegativity

1.24

First ionisation energy

589.3

kJ/mol

Melting point

1802

K

Boiling point

3141

K

Density

9.066

g/cm³

Abundance

3.5

mg/kg

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