C1a

  • Atoms and elements 
  • Limestone
  • Metals
  • Crude Oil
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Atoms and elements

Atomic Structure

Atoms consist of:

  • protons - positive - in nucleus
  • electrons -  negative
  • neutrons - neutral - in nucleus

Compounds -  formed when 2 or more different kinds of atoms join together

Periodic table

  • more than 100 elements
  • vertical collumns = groups - contain similar properties
  • e.g group 1 contains v.reactive metals - Sodium (Na)
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Limestone

Limestone - mainly calcium carbonate (CaCO3)

Thermal Decomposition - Quicklime

calcium carbonate right facing arrow with heat (http://www.bbc.co.uk/schools/gcsebitesize/science/images/arrow_heat.gif) calcium oxide (quicklime) + carbon dioxide

CaCO3right facing arrow with heat (http://www.bbc.co.uk/schools/gcsebitesize/science/images/arrow_heat.gif) CaO (quicklime) + CO2

Slaked Lime

calcium oxide + water → calcium hydroxide (slaked lime)

CaO + H2O → Ca(OH)2(slaked lime)

Uses

  • Limestone -

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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Comments

Shannon Tennant-Smith - Team GR

Limestone bit was really helpful! :)

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