So I was wondering... for no particular reason: Say you have a proton and your right arm is a particle accelerator. You throw the proton at about 90% the speed o' light. The you take your left arm which also happens to be a particle accelerator and you shoot an electron out right next to it. Conveniently the two particles are the distance at which they would normally be if they were an atom at room temperature of about 300k. Could they form an atom? What I'm trying to get at if you didn't get that is: if you have a proton moving at the almost speed o' light and you have an electron that relative to that proton is stationary. (Of course the electron is also moving at 90% the speed of light but relative to the proton it is stationary). Like two cars going at 100mph. If you took away the road and wind resistance nobody in the cars would be able to tell if they were moving because they would have nothing to compare themselves to. It's like how the Earth is spinning a thousand miles per hours but we don't feel it because we are spinning with the Earth. Does the same apply to protons and electrons. Are they to each other stationary? To be redundant in case you missed it what I am getting at is if you take a proton and electron and accelerate them in the same direction next to each other with the same speed can they form an atom? i.e. stable electron orbit, or would the two subatomic particles ionize? Please explain why or why not. :) <- This atom looks pretty cool, thought I'd put it in. Anyways thx for reading.