01 n. A rare metallic element of the alkali metal series, atomic number 37. It occurs quite widely, but in small quantities, and always combined.…
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A rare metallic element of the alkali metal series, atomic number 37. It occurs quite widely, but in small quantities, and always combined. It is isolated as a soft yellowish white metal, analogous to potassium in most of its properties. Symbol Rb. Atomic weight, 85.48.(Chem.)