akon
Rb is the symbol for the element, rubidium.
RB ???
RB as it is at this time
Rb
RB Curtis Martin.
85.4678 is the atomic weight of Rb.
RB means random boner
The oxidation number of Rb is 1.
Tennessee Titans RB - Chris Johnson
Rb (rubidium) is a metal.
Their 1st String RB is Tim Hightower