The history of the atom

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6 Terms

1
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What is the timeline of the atom

  1. the atomic model( Small spheres separated by empty space)

  2. John dalton

  3. JJ Thomson

  4. Ernest rutherford

  5. Neil Bohr

  6. James chadwick

2
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What did john dalton discover

Atoms are small solid spheres

Different atoms make up different elements

3
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What did JJ Thomson discover

Electrons and the plum pudding model

4
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What did Ernest rutherford discover

Fired alpha particles at gold foil and discovered the nuclear model

positive nucleus in the center of the atom and negative electrons surrounding it

5
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What did niels bohr discover

Electrons orbit the nucleus in shells

6
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What did James chadwick discover

Neutrons in the nucleus