Name gadolinium
Symbol Gd
Atomic Weight 157.25
Atomic Number 64
CAS ID 7440-54-2
Group Number
Group Name Lanthanoid
Period Number 6
Origin of Name Named after J. Gadolin, a Finnish chemist.
Year Discovered 1880
Discovery Credits Discovered by J. C. Galissard de Marignac at Geneva, Switzerland. Isolated in 1886 by P. E. Lecoq de Boisbaudran at Paris, France.
Class Metallic
Color Silvery White
Standard State Solid at 77 F & 298 K
Description Silvery-white metal of rare earth group. Reacts slowly with oxygen and water, dissolves in acids. Used in magnets, electronics, neutron radiography, and alloys, with iron for magneto-optic recording devices.

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

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