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Suppose there's an atom in deep space, beyond the reach of gravity of any close-by galaxies. When this atom is bombarded with gamma radiation, and an electron is ejected, wouldn't this ejection also exert reverse 'thrust' on the atom itself, in accordance to Newton's 3rd law? In other words, would gamma or high energy x-ray radiation be capable of moving an atom if no other forces are exerted? And if not, why not?