Rb


Symbol, Chemistry.

Definition for rb (2 of 2)

R&B

or r&b, R and B


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Examples from the Web for rb

British Dictionary definitions for rb

Rb


the chemical symbol for

rubidium
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for rb

Rb


The symbol for the elementrubidium
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for rb (1 of 2)

Rb


The symbol for rubidium.

Science definitions for rb (2 of 2)

rubidium

[ rōō-bĭdē-əm ]

Rb

A soft, silvery-white metallic element of the alkali group. It ignites spontaneously in air and reacts violently with water. Rubidium is used in photoelectric cells, in making vacuum tubes, and in radiometric dating. Atomic number 37; atomic weight 85.47; melting point 38.89°C; boiling point 688°C; specific gravity (solid) 1.532; valence 1, 2, 3, 4. See Periodic Table.
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