atomic_number_21 (HyperDic hyper-dictionary) (English)

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English 1 sense of the expression *atomic number 21*:
NOUN	substance	atomic number 21, scandium, Sc	a white trivalent metallic element

Englishatomic number 21: 1 sense noun 1, substance
Meaning	A white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite.
Synonyms	scandium, Sc
Broader	metallic element, metal	Any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.
Substance of	thortveitite	A mineral consisting of scandium yttrium silicate
Spanish	escandio, número atómico 21, Sc
Catalan	escandi, número atòmic 21, Sc

HyperDicEnglishATOMIC NUMBER 2 ... atomic number 21