Elements, Compounds and Mixtures

• Approximately how many elements are there?

  Around 100
• Where are elements shown on?

  periodic table
• What is an element?

  a Substance that contains only ONE type of atom.
• What is a compound?

  2 or more different elements chemically combined
• What is a mixture?

  A combination of two or more substances that are not chemically combined
• What are fixed proportions

  Same ratio of each element in a compound
• What are the 5 ways to separate a mixture?

  Filtration

  Simple Distillation

  Fractional Distillation

  Crystallisation

  Chromotography
• What is a molecule?

  2 or more different or same elements chemically combined
• What is an atom?

  Smallest part of an element that can exist
• What two classifications are there in the periodic table based on their properties?

  Metals and Non metals