Properties

Atomic Number	67
CAS Registry Number	7440-60-0
Chemical Symbol	Ho

History

The atomic number is 67 and the chemical symbol is Ho. The name derives from the Latin holmia for Stockholm. It was discovered in erbia earth by the Swiss chemist J. L. Soret in 1878 who referred to it as element X. It was later independently discovered by the Swedish chemist Per Theodor Cleve in 1879. It was first isolated in 1911 by Holmberg who proposed the name holmium either to recognize the discoverer Per Cleve who was from Stockholm or perhaps to establish his own name in history.

Holden, Norman E., (2004). History of the origin of the chemical elements and their discoverers. National Nuclear Data Center. Retrieved from http://www.nndc.bnl.gov/content/elements.html