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11 months ago
Dalton suggested that matter was made from atoms. Others had suggested this before but his models were more accurate as his in-depth research of gases and proved him right his theory proved that: -all atoms of an element are the same - different elements had different atom types Technology at the time couldn't see the atoms but Dalton imagined them as though they were tiny balls
Joseph John Thomson discovered the subatomic particle, electron. During his experiments he found that beams of certain rays change direction in a magnetic or electric field. He concluded that the rays were actually tiny particles and were negatively charged. his model showed 2 things over Dalton's , electrons and neutral overall charge. on his model he said the atoms are like cake, a main base of something and little electrons on top
Ernest Rutherford with HAns Geiger and Ernest Marsden to test plum pudding
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