rubidium
rubidium[rʊˈbɪdɪəm]noun- [mass noun]the chemical element of atomic number 37, a rare soft silvery reactive metal of the alkali metal group(Symbol: Rb)
(化学元素)铷(符号:Rb)
语源- mid 19th cent.: modern Latin, from Latin rubidus 'red' (with reference to its spectral lines)
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