Compounds, Mixtures 'n' Elements

Compounds, Mixtures 'n' Elements

1. Elements

   • Elements can't be split up into anything simpler by chemical ethods. They only contain one type of atom.
   • There are about 100 different elements.
   • Each element has a name and a shorthand symbol (e.g. Carbon = C).
   • Everything on Earth is made up of elements.
   • The Periodic Table lists all the elements
     • The number in the top right corner of an element is the Relative Atomic Mass.
     • The number in the bottom right corner of and element is the Atomic Number
     • On the left of the Periodic Table are the Metals
     • In the middle of the Periodic Table are the Transition Metals
     • On the right of the Periodic Table are the Non-Metals.
     • A group is a vertical column of elements
       • Examples
         • Group 1 = The Alkali Metals
         • Group 2 = The Alkaline Earth Metals
         • Group 7 = The Halogens (Halogen means 'Salt -former' and compounds with a halogen in it is called a 'salt'.
         • Group 0 = The Noble Gases

2. Mixtures

   • Mixtures are substance NOT chemically joined up