This isn't homework - just some questions that have come up from reading The Fabric of the Cosmos: 1) Say you measure the position of an electron for a hydrogen atom on Earth and, beating all odds, find that it's actually on the moon (forget any details as to how you'd actually find it if it's on the moon). Once its been located in that new position does it retain its previous probability wave centered about the proton on Earth, or does a new wave have to be calculated for it? In the latter case, does that mean an atom can simply lose electrons without any external forces applied to it? Or would it never actually be 'lost' until you measured its position? 2) In the above situation, if it retains its probability wave and you re-run the experiment and find the new position of the electron to be within the 1S orbital, how do you avoid problems with special relativity if it made that trip from the moon the last time you measured it to the earth the second time you measured it faster than light? Maybe because it's a random event and no actual information is capable of being transmitted between the two positions? 3) What's the threshold for quantum effects? Do entire atoms, entire molecules have probability waves, or only elementary particles?