Which fundamental particle has negative charge ?

Options

A. Electron
B. Proton
C. Neutron
D. (a) and (b)

Answer

To answer the question "Which fundamental particle has a negative charge?", we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Fundamental Particles**: The three fundamental particles we need to consider are electrons, protons, and neutrons.

2. **Determine the Charge of Each Particle**:
- **Electrons**: Electrons are known to have a negative charge. The charge of an electron is approximately -1 elementary charge (or -1 amu).
- **Protons**: Protons have a positive charge. The charge of a proton is approximately +1 elementary charge (or +1 amu).
- **Neutrons**: Neutrons are neutral particles, meaning they have no charge.

3. **Compare the Charges**:
- From the information above, we can summarize:
- Electrons: Negative charge
- Protons: Positive charge
- Neutrons: No charge

4. **Conclusion**: Based on the charges of these fundamental particles, the only particle that has a negative charge is the electron.

### Final Answer:
The fundamental particle that has a negative charge is the **Electron**.

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