holmium

Name holmium
Symbol Ho
Atomic Weight 164.9.032
Atomic Number 67
CAS ID 7440-60-0
Group Number
Group Name Lanthanoid
Period Number 6
Origin of Name Latin, Holinia = "Stockholm."
Year Discovered 1878
Discovery Credits Discovered by P. T. Cleve at Uppsala, Sweden and independently by M. Delafontaine and J. L. Soret at Geneva, Switzerland
Class Metallic
Color Silvery White
Standard State Solid at 77 F & 298 K
Description Silvery metal of the rare earth group. Slowly attacked by oxygen and water, dissolves in acid. Used as flux concentrator for high magnetic fields.

Diagnostic tests: 
There are no simple diagnostic tests to identify holmium.
X-ray fluorescence spectroscopy is commonly employed to identify and analyze members of the Rare-Earth group elements.

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