Which of the following gave the idea of nucless of the atom ?

Options

A. Oil drop experiment
B. Devision and germer's experiment
C. `alpha` rays acatering experiment
D. Aston's mass spectrogram experiment

Answer

To determine which experiment gave the idea of the nucleus of the atom, we will analyze the provided options step by step.

### Step 1: Identify the Experiments
We have four experiments to consider:
1. Oil Drop Experiment
2. Davisson-Germer Experiment
3. Alpha Ray Scattering Experiment
4. Aston's Mass Spectrogram Experiment

### Step 2: Analyze Each Experiment
- **Oil Drop Experiment**: This experiment was conducted by Robert Millikan to measure the charge of an electron. It did not provide any information about the nucleus of the atom.
- **Conclusion**: Incorrect option.

- **Davisson-Germer Experiment**: This experiment demonstrated the wave nature of electrons, confirming the dual nature of matter. It is not related to the nucleus.
- **Conclusion**: Incorrect option.

- **Alpha Ray Scattering Experiment**: Conducted by Ernest Rutherford, this experiment involved bombarding a thin gold foil with alpha particles. Most of the particles passed through, but some were deflected at large angles. This led Rutherford to conclude that an atom has a small, dense nucleus at its center, which contains most of its mass.
- **Conclusion**: Correct option.

- **Aston's Mass Spectrogram Experiment**: This experiment was used to determine the isotopes of elements and their relative masses. It does not provide insights into the structure of the atom's nucleus.
- **Conclusion**: Incorrect option.

### Step 3: Final Answer
Based on the analysis, the experiment that gave the idea of the nucleus of the atom is the **Alpha Ray Scattering Experiment** conducted by **Ernest Rutherford**.