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Elements and compounds (Metals and non metals (The two main types of…

- - - - atoms can be broken down into protons, electrons and neutrons
        
        Scientists have developed a way to write down all the these elements in a shorter form. Every element has its own chemical symbol and they are often derived form its first letters
- - - - The charctistics of metals are
        
        they conduct electricity
        
        some are magnetic
        
        some are tough
        
        High melting point, low boiling point
        
        they can be stretched or hammered into a new shape
        
        conduct thermal energy
        
        high density
  - - - good electric insulators except graphite
      - they are normally brittle
      - Good thermal insulators
      - they have various melting and boiling points. some are liquid at room temp and some are solid
      - there are less types of non metals but they make up most of our world
- - - - eg. Hydrogen + Oxygen +heat ----> Water
      - we can mix the chemical symbols of the joined elements to make a symbol for the compound e.g Hydrogen = H Oxygen = O2 so water = H2O
        
        There are a few rules to the naming:
        
        if it has more than one of its elements atoms then it ends in 'mono' 'di' 'tri'
        
        when three are mixed and one is oxygen it ends in 'ate'
        
        If 2 elements join it ends in 'ide'