Rb is the symbol for the element, rubidium.
RB as it is at this time
RB ???
RB means random boner
85.4678 is the atomic weight of Rb.
The oxidation number of Rb is 1.
Each atom of Rubidium (Rb) has 37 protons.
Their 1st String RB is Tim Hightower
Tennessee Titans RB - Chris Johnson
Rb (rubidium) is a metal.
Since Rb forms a 1+ ion the formula for rubidium oxide is Rb2O.
on the xbox it is,up,up,left,right,rb,rb,lt,rb,lb,down