Ernest Rutherford's model of the atom didn't specifically include the __ .

Options

A. Proton
B. Electron
C. Nucleus
D. Neutron

Answer

To solve the question regarding what Ernest Rutherford's model of the atom did not specifically include, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Rutherford's Model**:
- Rutherford's model proposed that the atom consists of a small, dense nucleus surrounded by electrons that revolve around it, similar to planets orbiting the sun.

2. **Identifying Key Components of the Model**:
- The model included the nucleus, which contains positively charged particles known as protons, and it described the behavior of electrons.

3. **Evaluating the Options**:
- **Proton**: Rutherford's model acknowledged protons as part of the nucleus.
- **Electron**: The model described electrons and their orbits around the nucleus.
- **Nucleus**: The nucleus was a central feature of Rutherford's model.
- **Neutron**: Rutherford did not include neutrons in his model, as they were discovered later by James Chadwick.

4. **Conclusion**:
- Based on the evaluation, the component that was not specifically included in Rutherford's model of the atom is the **neutron**.

### Final Answer:
Ernest Rutherford's model of the atom didn't specifically include the **neutron**.

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