How atoms change over time

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  • Do you know how models of atoms changes over time ?
  • Of course
  • Wow! This helps so much
  • well the first atom was discovered by JJ Thomas in 1904 he thought that the atoms were composed purely of negatively charged atoms . This atom is known as plum pudding model
  • Is there more models that change over time?
  • yes ! There is another theory was discovered by Ernest Rutherford it was the gold foil experiment that happen in 1911. Rutherford shot alpha particles at the gold foil. Some of it bounced back which meant it was a a positive nucleus
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