Definitions

• Define element

  A substance made of only one type of atom
• Define atom

  The smallest particle that makes up everything
• Define molecule


  A group of atoms bonded together
• Define compound


  A substance made up of two or more elements chemically bonded together
• Define metal


  A solid material which is usually hard and shiny
• Define non-metal


  A chemical element usually characterised by low density and high electronegativity
• Define reactants


  A substance that takes part in a chemical reaction
• Define products 


  The end result of a chemical reaction
• Define Displacement Reaction


  Reactions where a more reactive metal takes the place of a less reactive metal in a compound
• Define Oxidation Reaction


  A reaction where a chemical substance changed because of the addition of oxygen
• Define thermal decomposition


  A chemical reaction that happens when a compound breaks down when heated