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Q. 10

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Physics for Scientists and Engineers: A Strategic Approach with Modern Physics
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Short Answer

Explain why the observation of alpha particles scattered at very large angles led Rutherford to reject Thomson’s model of the atom and to propose a nuclear model.

Because according to Thomson’s model positively and negatively charged particles are mixed together in a space. So, most of the electric forces cancel out resulting in weak interaction forces.

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Step by Step Solution

Step 1: Given Information

We have given that alpha particles scattered at very large angles throughout the experiment.

Step 2: Explanation

In his experiment, Rutherford found that the alpha particles are scattering at very large angles which means there is a strong and highly positively charged particles concentrated together at a point but according to Thomson’s model positively and negatively charged particles are mixed together in a space. So, most of the electric forces cancel out resulting in weak interaction forces.

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