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6 Cards in this Set

  • Front
  • Back

Who described atoms as old spheres and said that different spheres made up the different elements

John Dalton

In what year did J.J.Thomson change the 'solid sphere' theory to the 'Plum Pudding Model'?

1897

Describe the 'Plum Pudding Model'

Large positive sphere with smaller negatively charged particles inside.

Who showed the 'Plum Pudding Model' was wrong?

Ernest Rutherford


What did Rutherford 'fire' at the extremely thin sheet of gold?

Some particles were deflected but most went straight through

Did Rutherford come up with the nuclear model?

Yes