Element Classification: Metal

Period Number: 5    

Group Number: 1    

Group Name: Alkali Metal

Electron configuration: [Kr] 5s1 

Valence electrons: 1

Isotope types: Rb 87 and Rb 85 charge: +1

Rubidium salts are used in glasses and ceramics and in fireworks to give them a purple colour. Potential uses are in ion engines for space vehicles and working fluid in vapor turbines.

Read more: http://www.lenntech.com/periodic/elements/rb.htm#ixzz3IdZCM1aN