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They said that they were small particals that made up things and couldn't be divided anymore, And they created the word Atom From the greek "word atomos"
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John said that atoms where little spheres and that can be divided anymore. He was also the first to study color blindness.
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The Plum Pudding Model is an atom model proposed by JJ Thomson, the physicist who discovered the electron. It is also known as the Chocolate Chip Cookie or Blueberry Muffin Model. You can easily picture it by imagining the said goodies. For example, you can imagine a plum pudding wherein the pudding itself is positively charged and the plums, dotting the dough, are the negatively charged electrons.
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He made the cathode ray tube and tested magnets with them what charge attracted and what pushed away
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Rutherford discovered the nucleus while shooting the alpha particals at the gold sheet
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bohr said that the elctrons are in an orbit,or the energy levels around the nuclues
