Chemistry

Chemistry

Basics
1. Atom- is the simplest part of an element eg. O (oxygen)
2. Compound- 2 or more atoms joined together eg.NaCl
3. Molecule- usually when two of the same atoms are joined and are usually gases eg. CO2
4. Ion- an atom with a charge eg. Na+
Structure of an atom
1. Number of electrons is equal to the number of protons
  1. So they have no overall charge
Limestone
1. The main compound found in limestone is calcium carbonate
2. CaCO3= calcium carbonate
3. Limestone cycle
  1. Calcium Carbonate (Limestone) CaCO3
    1. Heat
      1. Calcium Oxide (Lime/ quick lime) CaCO
        Add a little water
        Calcium Hydroxide ( Slaked lime.) Ca(OH)2
        Add more water and filter
        Calcium hydroxide solution ( Limewater ) CaCOH2 (H2O)
        Add CO2
4. Sedimentary rock
5. Can be quarried to be used as building materials
  1. Advantages: Creates jobs, when quarried it is then landscaped so fits in with natural scenery and is a useful material.
  2. Disadvantages: Traffic congestion, greenhouse gases, explosives cause pollution and destroy habitats.
6. Glass making- glass is made by mixing limestone with sand and soda.
Extracting metals
1. Reactivity series:
  1. Potassium
    1. Sodium
      1. Calcium
        Magnesium
        Aluminium
        Carbon
        Zinc
        Iron
        Tin
        Lead
        Hydrogen
        Copper
        Silver
        Gold
        Platinum

Resumo de Recurso

	Criado por Emily Simms aproximadamente 10 anos atrás