Edexcel AS Chemistry - Ionisation Energy and Electron Affinity

  • Created by: Booga
  • Created on: 03-01-11 16:22


First Ionisation Energy

First ionisation energy is the energy required to remove 1 electron from each atom in 1mol of gaseous atoms in order to form 1mol of gaseous ions with a charge of 1+

{Atoms must be in gaseous state}

{Measured in KJmol-1}

{Lower IE = easier to ionise}



Successive Ionisation Energies

Successive ionisation energies require more energy each time. This is because after the first ionisation energy you are left with a positive ion.

{You can have as many successive ionisation energies as there are electrons in the original atom}



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