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Scandium is used in aluminum-scandium alloys for aerospace industry components and for sports equipment such as bicycle frames, fishing rods, golf iron shafts and baseball bats.
The radioactive isotope ⁴⁵Sc is used in oil refineries as a tracing agent.
Very dilute scandium sulfate is used to improve the germination of seeds such as corn, peas and wheat.
https://www.chemicool.com/elements/scandium.html

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physical: Scandium metal is a silvery-white solid with a slight pink or yellow tint when exposed to air. It has a melting point  of 1,538°C (2,800°F) and a boiling point  of about 2,700°C (4,900°F). Its density is 2.99 grams per cubic centimeter.
http://www.chemistryexplained.com/elements/P-T/Scandium.html

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discovered in 1879 by Lars Fredrick Nilson
https://en.wikipedia.org/wiki/Scandium

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Scandium is a chemical element with symbol Sc and atomic number 21.
atomic mass:
44.955912 u ± 0.000006 u
symbol:sc
https://en.wikipedia.org/wiki/Scandium