yttrium

Name yttrium
Symbol Y
Atomic Weight 88.90585
Atomic Number 39
CAS ID 7440-65-5
Group Number 3
Group Name (none)
Period Number 5
Origin of Name Named after Ytterby, Sweden.
Year Discovered 1794
Discovery Credits Discovered by J. Gadolin at Abo, Finland.
Class Metallic
Color Silvery White
Standard State Solid at 77 F & 298 K
Description Soft, silvery-white metal. Stable in air due to the formation of oxide film. Reacts with water to form hydrogen (H2). Used as yttrium phosphors to give red colors in television CRT screens; in X-ray filters, superconductors; super-alloys.

Diagnostic tests: 
There are no simple diagnostic tests to identify yttrium.
X-ray fluorescence spectroscopy is commonly employed to identify and analyze this element.

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