Why would it be more difficult to inject the nucleus of uranium with a proton?

Because there are already 92 protons in the

uranium nucleus, combining their repulsive power to reject the one new one. However, if the energy of the incoming proton is sufficiently great, then at extremely close distance, the uranium nucleus will attract the proton and draw it into the nucleus. This is called the strong force.

16 S 33

Explanation:

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your answers are a,b,,e and f

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the answer to this question is 3.