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A greek democritus suggested that matter is made up of tiny particles that can not be broken down further
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The Philosopher Aristotle believed in Empedocles "four elements" model despite the more recent "atomic" model
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a greek scholar named Empedocles proposed that matter was composed of four elements Water,Fire.Air and Earth. these elements mixed togather in different proportions to yield diffrent substances.
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Many alchemists believed that they did. ( combination of philosopher, mystic, magician and chemist.
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An english scientist , Robert Boyle, did not belive in the four elements model. He made a new definition for the word element.
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Joseph Priestly was the first person to isolate oxygen scientifically, but he didnt know that oxygen is a element. that fact was recognized ny Antoine Lavoisier.
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Daltons atomic model cannot explain why, on a dry winter day, you get a spark when you touch a metal doorknob. ( chargeg an ekectricity that may build up an object )
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by this time it was generally accepted that matter was made of elements : the two models have come togather
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J.J. thomson revised that atomic model further: to explane his discovery to very light negative particles , called electrons.
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Ernest Rutherford working at McGill university in montreal, designed an experiment to test Thomson's and Nagaoka's model.
