changes of state and particle model

• density equation

  density=mass/volume
• what are the 3 states of matter

  solid, liquid and gas
• what is the most dense state of matter

  solid
• what is the least dense state of matter

  gas
• describe the particle arrangement of a solid

  tightly packed and particles only vibrate on the spot
• describe the particle arrangement of a liquid

  close together but can flow over eachother
• describe the particle arrangement of a gas

  separated and they move freely
• what is always conserved when a particle changes state

  mass
• how is a change of state different to a chemical change

  a change of state is reversible
• what is sublimation

  solid into a gas without passing a liquid state
• what is evaporation

  liquid to gas
• what is condensation

  gas to liquid