Subject: Has an escape velocity and/or force been established for an electon?

Has there been an experiment (or calculation) to determine the actual force 
required to physically pull an electron from a hydrogen atom.  If so, is this 
force relative to the force required to pull an object from the earths gravity 
(ie, if the proton were the size of the earth and the object had the same 
relative  mass and distance as the electron).  
And on a similiar note: can one of the planets be compared to an electron if 
the proton was the size of the sun?  

Re: Has an escape velocity and/or force been established for an electon?