 |
| 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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