Rutherford's scattering formula fails for very small scattering angles because:

the gold foil is very thin

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the kinetic energy of

α

-particles is very high

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the full nuclear charge of the target atom is partially screened by its electron

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there is strong repulsive force between the

α

-particles and nucleus of the target

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Solution

The correct options are
C the full nuclear charge of the target atom is partially screened by its electron
D there is strong repulsive force between the $α$ -particles and nucleus of the target
Rutherford's scattering formula fails for very small scattering angles because:
$(1)$ The full nuclear charge of the target atom is partially screened by it's electron
$(2)$ there is strong repulsive force between the $α$ particles and nucleus of the target.

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Similar questions

Q. Assertion :In Rutherford's gold foil experiment, very few

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Q. In Rutherford's

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Answer the following questions, which help you understand the difference between Thomson’s model and Rutherford’s model better.

(a) Is the average angle of deflection of α-particles by a thin gold foil predicted by Thomson’s model much less, about the same, or much greater than that predicted by Rutherford’s model?

(b) Is the probability of backward scattering (i.e., scattering of α-particles at angles greater than 90°) predicted by Thomson’s model much less, about the same, or much greater than that predicted by Rutherford’s model?

(c) Keeping other factors fixed, it is found experimentally that for small thickness t, the number of α-particles scattered at moderate angles is proportional to t. What clue does this linear dependence on t provide?

(d) In which model is it completely wrong to ignore multiple scattering for the calculation of average angle of scattering of α-particles by a thin foil?

Q. From Rutherford's

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