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the nucleus of an atom was first discovered
one of the most positively charged particles he made it from a radioactive source
was aimed at a fluorescent screen
the particles calls the fluorescent screen to blow
but a very famous sheet of gold foil was placed in the pathway of the particle being
a few particles were deflected to decide
occasionally particles were deflected straight back
but nearly all particles past right through the gold foil as if it were not there
the scientists concluded that atoms must be mostly empty space
and that because some particles are deflected there must be a small positively charged central
mass
which they called the nucleus