scandium

Name scandium
Symbol Sc
Atomic Weight 44.955910
Atomic Number 21
CAS ID 7440-20-2
Group Number 3
Group Name (none)
Period Number 4
Origin of Name From the Latin, Scandia, meaning "Scandinavia."
Year Discovered 1879
Discovery Credits Discovered by L. F. Nilson at Uppsala, Sweden.
Class Metallic
Color Silvery White
Standard State Solid at 77 F & 298 K
Description Soft, silvery-white metal. Tarnishes in air and burns easily. Reacts with water to form hydrogen gas. Forms salts with acids. Little used.

Diagnostic tests: 
There are no simple diagnostic tests to identify scandium.
X-ray fluorescence spectroscopy is commonly employed to identify and analyze members of the group 3 elements. 

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