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The air also contained a small amount of argon.

As the temperature of the air decreased the argon changed from a gas to a liquid to a solid.
Explain the changes in the arrangement and movement of the particles of the
argon as the temperature of the air decreased.

User Teodor Anton
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Answer:

When argon changes from a gas to a liquid, the forces between the molecules become stronger so the particles become closer together and come into come into contact more often. The particles move at a less faster rate as the have less kinetic energy due to decrease in temperature. When argon changes from a liquid to a solid, the forces become even stronger so the particles are arranged in fixed positions and vibrate around a fixed point as they cannot move past each other

User Sukhjeevan
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