Rubidium
/ˌɹuːˈbɪd.i.əm/
noun
The chemical element (symbol Rb) with an atomic number of 37. It is a soft, highly reactive alkali metal.
A single atom of this element.
rubidium
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/ˌɹuːˈbɪd.i.əm/
The chemical element (symbol Rb) with an atomic number of 37. It is a soft, highly reactive alkali metal.
A single atom of this element.
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