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Thompsons model
the atom was a ball of positive charge with electrons evenly dotted through (like currents in a pudding)
what type of particle was shone at gold leaf
He 2+ (alpha rays)
why was gold leaf used?
they could slice it thin enough without it breaking
Vacuum chamber
removes all excess atoms/particles from experiment to ensure the He2+ atom did not ionize the air
zinc sulfide coating on screen