Consider two hydrogen atoms, isolated from all other objects and
  influences in deep space.
  The two atoms are exactly r = 1 m apart from each other.
  Atom A is motionless, while atom B is moving away from 
  it at v = 1 m/s.


    Q:   What will happen to these two atoms?


 
             K  =  0 J   +  (1/2) * (1.67 x 10^(-27) kg) * (1 m/s)^2

                =     8.35 x 10^(-27)  J


                      (6.67 x 10^(-11) N*m^2/kg^2) * 1.67 x 10^(-27) kg)^2
             U  =   - ----------------------------------------------------
                                          1 m 


                =   - 1.86 x 10^(-64) J


         The virial quantity is

                  2 K  +  U   >   0

         so the system is unbound.

         The two atoms will continue to move away from each other
         forever.