Matter

Anotações:

• Consists of two or more substances mingled together, but not chemically combined

1. Properties

   Anotações:

   • Made up of two or more substances
   • Amounts of substances in a mixture can vary
   • Usually easy to separate the substances in a mixture
   • Properties of a mixture are similar to those of the substances in the mixture
   • Very little heat change when a mixture is made

Anotações:

• Matter with a specific composition and properties

1. Elements

   Anotações:

   • A substance made up of only one type of atom
2. Compounds

   Anotações:

   • Consist of two or more elements chemically combined
   1. Properties

      Anotações:

      • Properties of a compound are different to those of the elements it contains
      • Made up of a single substance
      • Elements in a compound are always in fixed ratio
      • Difficult to separate the elements of a compound
      • There is usually a heat change when a compound is formed

Anotações:

• The smallest part of an element or compound that can exist on its own

1. Iron and Sulphur mixture

   Anotações:

   • Yellow colour with grey granules
   • Magnetic
2. Iron Sulphide compound

   Anotações:

   • Dark grey colour
   • Non-magnetic
   • Formed by heating Iron and Sulphur mixture