Name europium
Symbol Eu
Atomic Weight 151.964
Atomic Number 63
CAS ID 7440-53-1
Group Number (none)
Group Name Lanthanoid
Period Number 6
Origin of Name Named after Europe.
Year Discovered 1901
Discovery Credits Discovered by E. A. Demarcay at Paris, France.
Class Metallic
Color Silvery white
Standard State Solid at 77 F & 298 K
Description Rare, and most reactive for the rare earth metals. Soft, silvery metal which reacts quickly with oxygen and water. Little used. Some used in thin-film superconductor alloy.

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

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