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Theory used to explain the arrangement a...

Theory used to explain the arrangement and movement of molecules in matter.

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### Step-by-Step Solution: 1. **Identify the Theory**: The question asks for the theory that explains the arrangement and movement of molecules in matter. The correct theory is the **Kinetic Theory of Matter** or **Kinetic Molecular Theory of Matter**. 2. **Understanding the Composition of Matter**: According to this theory, matter is composed of **tiny particles**. These particles can be atoms or molecules, and they are not stationary. 3. **Movement of Particles**: The kinetic theory states that all particles of matter are **constantly moving**. This movement is not random but is influenced by various factors, primarily temperature. ...
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