Explain the changes in the arrangement and movement of the particles of the argonas the temperature of the air decreased.

As the temperature of the air decreases, the particles of argon undergo several changes in their arrangement and movement.

1. Decreased Kinetic Energy: The kinetic energy of the argon particles decreases as the temperature drops. This is because temperature is directly proportional to the average kinetic energy of the particles. So, when the temperature decreases, the particles slow down.

2. Closer Arrangement: As the particles slow down, they move less vigorously and tend to come closer together. This is due to the decrease in the kinetic energy which reduces the collisions between the particles, allowing them to come closer.

3. Decreased Volume: As the particles come closer together, the volume occupied by the argon gas decreases. This is a direct result of the decreased movement and closer arrangement of the particles.

4. Increased Density: As the volume decreases, the density of the argon gas increases. This is because density is mass per unit volume. As the volume decreases while the mass remains constant, the density increases.

5. Decreased Pressure: The pressure exerted by the argon gas also decreases as the temperature decreases. This is because pressure is directly proportional to temperature. As the temperature decreases, the particles hit the walls of the container less frequently and with less force, resulting in decreased pressure.

In summary, as the temperature of the air decreases, the argon particles slow down, come closer together, occupy a smaller volume, become denser, and exert less pressure.