Chemestry-states of matter and elements

solid   fixeed shape-cannot flow-strong forces between particles
liquid   not fixed-can flow-weak forces holding together
gas   not fixed shape-can flow-very weak forces holding together

      General structure of solids, liquids and gases

• Matter is made of atoms and molecules
• The matter in a soli is held together in a rigid structure
• The matter in a liquid are able to move around.
• the matter in gas is free and can move around as it wants. 

      Change of state

• melting point is the temperature when a solid changes into a liquid.
• boiling point is when a liquid changes into a gas.

      Elements

• elements are substances that cannot be made simpler.
• an atom is the smallest part of an element but still retains the properties. still has the same stuff in it.
• a molecule is the smallest part of a element that is itself, eg two oxygen molecules that are bonded together