Symbol	Rb	Atomic radius: pm	248	Fusion: kJ/Mole	2.19
Name	Rubidium	Ionic radius: pm	(+1)161	Boiling point: °C	688
Atomic number	37	Electron affinity	0.49	Melting point: °C	39
Atomic weight	85.47	1st  ion potential	4.18	Specific Heat Cap: J/(g K)	0.36
Classification	Alkali metal	Natural form	Solid	Thermal Cond: W/(cm K)	0.58
Configuration	[Kr]5s1	Crystal structure	BCC	Electrical Cond	0.0779
Oxidation states	1	Density	1.53	Abundance: mg/kg-crust	90
Electronegativity	0.82	Vaporization: kJ/Mole	69.2
Rubidium was discovered in 1861 by Robert Bunsen and Gustav Kirchloff.			Uses - photocells, catalysts, making special glasses