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Mention two observations of Geiger- Mars...

Mention two observations of Geiger- Marsden's experiment on scattering of alpha particles .

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1.Most of the alpha - particles pass straight through the gold foil.
2.Only 0.14% of incident `alpha`-particles scatter by more than `1^@`
3.About one in 8000 of the `alpha`-particles is deflected by more than `90^@`.
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