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Question

When fast moving alpha particles are made to fall on a thin gold foil, most of them go straight through the foil because:

A
alpha particles are much heavier than electrons
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B
alpha particles are positively charged
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C
most part of the atom is empty space
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D
alpha particles move with high velocity
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Solution

The correct option is C most part of the atom is empty space
Most of the αparticles in Rutherford's experiment passed through the gold foil without getting deflected. Based on this, Rutherford concluded that most of the space inside the atom is empty.

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