Name terbium
Symbol Tb
Atomic Weight 158.92534
Atomic Number 65
CAS ID 7440-27-9
Group Number
Group Name Lanthanoid
Period Number 6
Origin of Name Named after Ytterby, Sweden.
Year Discovered 1843
Discovery Credits Discovered by C. G. Mosander at Stockholm, Sweden.
Class Metallic
Color Silvery White
Standard State Solid at 77 F & 298 K
Description Silvery white metal, rare member of the lanthanide (rare earth) group. Slowly oxidized by air, reacts with cold water, Used in solid state devices and lasers.

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

Back to Elements Table Page