Atomic Structure

• Elements

  • Substance that cant be broken down into simpler substances by chemical means,
  • They are basic building blocks of all substances.
  • They are made up of only one type of atom.
• Compounds

  • Substances made of two or more different types of atoms that are chemically joined (can be represented by a chemical formula).
  • They have completely different properties to the elements they are made from.
• Mixtures

  • Mixture is made from different substances that aren’t chemically joined together.
  • They can only be made from different elements or compounds mixed together.
  • Can usually be separated by physical techniques.
• Element - each molecules are the same, made up of one type is atom only.

  
• Compound - each molecules are the same, consist of two different types of atoms chemically joined.

  
• Mixture - two different types of molecules present, different molecules not chemically joined.