Consider the following statements
Rutherford's alpha particle scattering experiment proved that nucleus
1. contains massive particles
2. is a positively charged centre
3. is quite stable
Which of these statements are correct ?

Options

A. 1 and 3
B. 1 and 2
C. 2 and 3
D. All of these

Answer

To determine which statements about Rutherford's alpha particle scattering experiment are correct, we can analyze each statement based on the conclusions drawn from the experiment.

### Step-by-Step Solution:

1. **Understanding the Experiment**: Rutherford conducted an experiment where he bombarded a thin gold foil with alpha particles. He observed how these particles interacted with the foil.

2. **Observation of Alpha Particles**: Most of the alpha particles passed through the gold foil without any deflection, indicating that the majority of the atom is empty space.

3. **Deflection of Alpha Particles**: Some alpha particles were deflected at large angles, and a few even bounced back. This indicated the presence of a dense, positively charged center in the atom, which we now know as the nucleus.

4. **Conclusions about the Nucleus**:
- **Massive Particles**: The experiment did not directly prove the presence of massive particles within the nucleus. Instead, it demonstrated that the nucleus is dense and positively charged. Therefore, the first statement is **incorrect**.
- **Positively Charged Center**: The deflection of alpha particles indicated that there is a positively charged center in the atom (the nucleus). Thus, the second statement is **correct**.
- **Stability of the Nucleus**: The experiment suggested that the nucleus is stable, as it could withstand the bombardment of alpha particles without disintegrating. Hence, the third statement is also **correct**.

5. **Final Conclusion**: Based on the analysis, the correct statements are:
- Statement 2: The nucleus is a positively charged center (Correct).
- Statement 3: The nucleus is quite stable (Correct).
- Statement 1: The nucleus contains massive particles (Incorrect).

Thus, the correct answer is that statements 2 and 3 are correct.