Holmium
Chemical element
>
Holmium is a chemical element; it has symbol Ho and atomic number 67. It is a rare-earth element and the eleventh member of the lanthanide series. It is a relatively soft, silvery, fairly corrosion-resistant and malleable metal. Wikipedia
Symbol: Ho
Atomic number: 67
Atomic mass: 164.93032 u
Electron configuration: Xe 4f11 6s2
Discoverers: Per Teodor Cleve, Marc Delafontaine, and Jacques-Louis Soret
Discovered: 1878
Melting point: 2,685°F (1,474°C)