Which of the following properties is different for solids, liquids and gases?

Options

A. movement of molecules
B. particle size of the substance
C. mass of the substance
D. energy exchanges

Explanation

To determine which property is different for solids, liquids, and gases, we can analyze the characteristics of each state of matter.

### Step-by-Step Solution:

1. **Understanding the Structure of Matter**:
- Solids have a rigid structure where molecules are tightly packed together. This results in a definite shape and volume.
- Liquids have a less rigid structure where molecules are still close but can move past one another. This gives liquids a definite volume but no definite shape.
- Gases have a very loose structure where molecules are far apart and move freely. Gases have neither a definite shape nor a definite volume.

2. **Movement of Molecules**:
- In solids, the molecules can only vibrate in place due to the strong intermolecular forces holding them together.
- In liquids, the molecules can slide past each other, allowing for some movement, but they are still relatively close together.
- In gases, the molecules move freely and rapidly, with negligible intermolecular forces, allowing them to spread out and fill the container they are in.

3. **Comparing Properties**:
- The key property that differs among solids, liquids, and gases is the movement of molecules.
- Solids have minimal movement (vibration), liquids have moderate movement (sliding past each other), and gases have maximum movement (free movement).

4. **Conclusion**:
- The property that is different for solids, liquids, and gases is the movement of molecules. This is the primary distinction that defines the behavior of each state of matter.

### Final Answer:
The property that is different for solids, liquids, and gases is the movement of molecules.

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