Which branch of physics deals with the study of atoms ?

Options

A. Quantum Physics.
B. Mechanics.
C. Electrostatics.
D. Thermodynamics

Explanation

To solve the question regarding which branch of physics deals with the study of atoms, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Question**: The question asks for the branch of physics that specifically focuses on the study of atoms.

2. **List the Options**: The options provided are:
- Quantum Physics
- Mechanics
- Electrostatics
- Thermodynamics

3. **Analyze Each Option**:
- **Quantum Physics**: This branch of physics is fundamentally concerned with the behavior of matter and energy at atomic and subatomic levels. It explains the properties and interactions of atoms.
- **Mechanics**: This branch deals with the motion of objects and the forces acting on them. It does not specifically focus on atoms.
- **Electrostatics**: This area of physics studies electric charges at rest and the forces between them. While it can involve atoms, it does not focus on their study specifically.
- **Thermodynamics**: This branch deals with heat, work, temperature, and the laws governing energy transfer. It is not focused on atomic structure or behavior.

4. **Determine the Correct Option**: Based on the analysis, Quantum Physics is the branch that specifically deals with the study of atoms. Therefore, the correct answer is:
- **Quantum Physics**

5. **Conclusion**: The branch of physics that deals with the study of atoms is Quantum Physics.