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rubidium

ru·bid·i·um

rubidium

pronunciation:
ru bI di m
features:
Word Parts
part of speech: noun
definition: a highly reactive chemical element of the alkali metal group that has thirty-seven protons in each nucleus, that occurs naturally only in compounds with oxygen and other elements, but that can be isolated as a liquid or very soft solid metal. (symbol: Rb)
derivation: rubidic (adj.)
Word Parts
The word rubidium contains the following part:
rub Latin root that means red
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