Chemistry : Unit 1 - Solids, Liquids, and Gases

• • Solids have a fixed volume and shape and they have a high density.
  • The atoms vibrate in position but can’t change location
  • The particles are packed very closely together in a fixed and regular pattern
• • Liquids also have a fixed volume but adopt the shape of the container.
  • They are generally less dense than solids (an exception is water),but much denser than gases.
  • The particles move and slide past each other which is why liquids adopt the shape of the container and also why they are able to flow freely
• • Gases do not have a fixed volume, and, like liquids,take up the shape of the container.
  • Gases have a very low density.
  • Since there is a lot of space between the particles,gases can be compressed into a much smaller volume.
  • The particles are far apart and move randomly and quickly(around 500 m/s) in all directions.
  • They collide with each other and with the sides of the container(this is how pressure is created inside a can of gas).