Atomic structure - Particles & history

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Last updated 4:31 PM on 9/19/26
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8 Terms

1
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Mass and charge of proton

1, +1

2
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Mass and charge neutron

1, 0

3
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Mass and charge electron

1/2000, -1

4
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What discovery led to the plum pudding model?

The electron

5
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Plum pudding model

Atom of positive charge with negative electrons embedded in it

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What led to the nuclear model?

The results of Rutherford and Marsden’s alpha scattering experiments

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What did the alpha scattering experiments show?

  • Most passed through showing it was mainly empty space

  • Some deflected or bounced back showing the mass at the centre had a positive charge

  • This meant electrons were thought to orbit the nucleus


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What did Bohr suggest?

That electrons orbited at specific distances from the nucleus