Physics · Alpha-particle scattering experiment, Rutherford's model of atom
Which of the following observations of -ray scattering experiment lead to the pr
Which of the following observations of \( \alpha \) -ray scattering experiment lead to the presence of small positively charged nucleus in the centre? This question has multiple correct options
- A. Most of the \( \alpha \) -particles passed straight
- B. Most of the \( \alpha \) -particles rebounded after hitting the atoms
- C. only a few \( \alpha \) -particles deflected away from their path
- D. Very few \( \alpha \) -particles rebounded
Step-by-step solution
In Rutherford's α-ray scattering experiment, most α-particles passed straight through the gold foil, indicating most of the atom is empty space. A small number were deflected at large angles, and very few rebounded almost straight back. The rebounding of a few α-particles could only be explained by a small, dense, positively charged nucleus that repels them. Thus, observation D directly indicates the presence of such a nucleus.
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