Particle model of matter

Question 1

Describe the particle arrangement of a solid

Answer 1

• strong forces of attraction hold the particles together in a fixed regular arrangement
• don’t have much energy so vibrate about their fixed positions
• highest density

Question 2

Describe the particle arrangement of a liquid

Answer 2

• weaker forces of attraction between the particles
• particles are close together but can move past each other
• form irregular arrangements
• move in random directions at low speed
• less dense

Question 3

Describe the particle arrangement of a gas

Answer 3

• almost no forces of attraction between the particles
• particles have the most energy
• free to move and travel in random directions at high speeds
• low density