Rb

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Rb rubidium.

The symbol for the element rubidium.

Rb,

symbol for the element rubidium.

rubidium [roo-bid´e-um]

a chemical element, atomic number 37, atomic weight 85.47, symbol Rb. (See Appendix 6.)

rubidium 82 a radioactive isotope of rubidium having a half-life of 1.273 minutes and decaying by positron emission. It is used as a tracer in positron emission tomography.

chemical symbol, rubidium.

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