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2. structure of atom — Chemistry STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceChemistry2. structure of atom1 Mark
MCQ
If the Thomson model of the atom was correct, then the result of Rutherford's gold foil experiment would have been:
  • ✓
    $\alpha$-Particles pass through the gold foil deflected by small angles and with reduced speed.
  • B
    All $\alpha$-particles get bounced back by $180^{\circ}$.
  • C
    $\alpha$-Particles are deflected over a wide range of angles.
  • D
    All of the $\alpha$-particles pass through the gold foil without decrease in speed
✓

Answer

Correct option: A.
$\alpha$-Particles pass through the gold foil deflected by small angles and with reduced speed.
a
As in Thomson model, protons are diffused (charge is not centered) $\alpha$-particles deviate by small angles and due to repulsion from protons, their speeddecreases.

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