Word:

atomic number 21

Noun1.atomic number 21 - a white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite
Synonyms: Sc, scandium
metal, metallic element, Sc, scandium, thortveitite
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atomic number 12
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atomic number 14
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atomic number 17
atomic number 18
atomic number 19
atomic number 2
atomic number 20
-- atomic number 21 --
atomic number 22
atomic number 23
atomic number 24
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atomic number 26
atomic number 27
atomic number 28
atomic number 29
atomic number 3
atomic number 30
atomic number 31
atomic number 32
atomic number 33
atomic number 34
atomic number 35
atomic number 36
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