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Summary All you need for GCSE AQA Chemistry Year 10 (2)
In depth summary on a large number of topics like percentage yields and Avagadro's number
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Year 10 Chemistry RA 1Model Good Bad Bonding
Ball and stick Shows connection Doesn’t show Covalent
electrons
Space filling Shows regular Doesn’t show ionic Ionic
arrangement bonds
3D Construction Shows the ionic Shows the ions too Ionic
bonds far apart
Dots and cross Shows shared Doesn’t show bonds Covalent
electron
Molecular formula- actual number of atoms in each element in a molecule
Eg. H2O = 1 x 2 + 16
Relative atomic mass = 18
Moles – big number in equation before substance
Avogadro’s number – 6.02 x 1023
Relative atomic mass = moles = Avogadro’s constant
Relative formula mass- weight of substance (g)
- measured by something equivalent on a scale
Number
of particles Mass
Avogadro’s Number of Moles Formula
Number moles mass
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