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Period: 323 to
Scientists
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370
Democratis
Democratis discovered the atom and knew that it could not be broken down into anthing smaller than itself. -
John Dalton
John Dalton thought that atoms were smooth, hard balls that cannot be broken into anything smaller. -
J.J Thomson
Thomson's theory was that atoms are made of even smaller parts with electrons in 1897. -
Ruthford
Ruthfords theory eas that atoms were mostly empty space but with a positive charge at its centre. -
Bohirs
Bohris theory was that electrons are only found in some specific areas that orbit around the nucules.