Particle model

What the syllabus asks of you

• Describe the particle structure of solids, 6 Know that the forces and distances between liquids and gases in terms of the arrangement, particles (atoms, molecules, ions and electrons) separation and motion of the particles and and the motion of the particles affects the represent these states using simple particle properties of solids, liquids and gases diagrams
• Describe the relationship between the motion of particles and temperature, including the idea that there is a lowest possible temperature (−273 °C), known as absolute zero, where the particles have least kinetic energy
• Describe the pressure and the changes in 7 Describe the pressure and the changes in pressure of a gas in terms of the motion of its pressure of a gas in terms of the forces exerted particles and their collisions with a surface by particles colliding with surfaces, creating a force per unit area
• Know that the random motion of microscopic 8 Know that microscopic particles may be moved particles in a suspension is evidence for the by collisions with light fast-moving molecules kinetic particle model of matter and correctly use the terms atoms or molecules as distinct from microscopic particles
• Describe and explain this motion (sometimes known as Brownian motion) in terms of random collisions between the microscopic particles in a suspension and the particles of the gas or liquid