67 Ho

Holmium

Lanthanide
Atomic number67
CategoryLanthanide
Atomic mass164.93
Electron configuration[Xe]4f¹¹ 6s²
Oxidation states+3
Electronegativity1.23
Melting point1,461 °C
Boiling point2,600 °C
Density8.79 g/cm³
Crystal structureClose-packed hexagonal
Period6
Blockf
Discovered1,878
Crustal abundance1.3 ppm

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