What is the charge on an electron?

Options

A. 1 unit of positive charge
B. 2 unit of positive charge
C. 1 unit of negative charge
D. 2 unit of negative charge

Answer

To determine the charge on an electron, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Charge**:
- An electron is a subatomic particle that carries a negative charge.

2. **Value of Charge**:
- The charge of an electron is quantified as a specific value.

3. **Scientific Notation**:
- The charge of an electron is expressed in coulombs, which is the standard unit of electric charge.

4. **Exact Charge Value**:
- The exact value of the charge on an electron is approximately -1.6 × 10^-19 coulombs.

5. **Conclusion**:
- Therefore, the charge on an electron is -1.6 × 10^-19 coulombs.

### Final Answer:
The charge on an electron is -1.6 × 10^-19 coulombs.

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