Scandium
Definition and meaning of Scandium in chemistry.
![Scandium element card: symbol Sc, atomic number 21, atomic mass 44.956, electron configuration [Ar] 3d¹ 4s², oxidation states +3, Transition metal, group 3, period 4, solid at room temperature.](/assets/images/terms/scandium-chemical-element.webp)
Scandium is a soft, silvery-white transition metal with the symbol Sc and atomic number 21. It is exceptionally light but still boasts a very high melting point. Scientists often group scandium with the rare-earth elements because it shares nearly identical chemical properties with them.
In more detail
Scandium sits in group 3 of the periodic table. It is historically the very first transition metal identified in the table. It is located strategically between calcium and titanium.
Scandium usually takes a highly stable +3 oxidation state during its chemical reactions. It reliably forms colorless chemical compounds. Scandium shares deep chemical similarities with yttrium and heavier lanthanide metals.
The element is fairly common throughout the Earth's crust. However, it almost never occurs in large or concentrated natural deposits. Miners usually find it only in tiny trace amounts.
It hides inside rare geological minerals like thortveitite and euxenite. When pure scandium touches air, it slowly changes its appearance. It develops a distinct yellowish or pinkish tint.
This color change happens because a protective passivation oxide layer forms on the metal surface. Scandium reacts quite easily with standard chemical acids. It also slowly dissolves in pure water.
This water reaction constantly releases bubbles of hydrogen gas. Scandium is remarkably light and possesses a very high melting point. However, it is incredibly scarce globally and extremely difficult to extract. These massive challenges severely limit its widespread commercial use.
Key facts
| Field | General Chemistry |
|---|---|
| Symbol | Sc |
| Atomic number | 21 |
| Atomic mass | 44.956 u |
| Category | Transition-Metal |
| Melting point | 1541 °C (2806 °F) |
| Year discovered | 1879 |
Engineers strategically mix scandium with aluminum to create specialized metallic alloys. These metal mixtures are incredibly strong and remarkably lightweight. Manufacturers use them extensively to build modern aerospace components. They also use scandium alloys to craft premium sports equipment like high-end bicycle frames.
Frequently asked questions
Is scandium traditionally considered a rare-earth metal?
Yes, scientists often group scandium with the rare-earth elements. It naturally occurs in the exact same mineral deposits and shares similar chemical properties.
Why are commercial scandium products so incredibly expensive?
Scandium rarely forms concentrated natural ores. It is also extremely difficult to isolate during refining. This makes the extraction process very complex and costly.
Related terms
Sources & references
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