chemistry lesson 8 miss b


a level chemistry notes:


  • the energy requires to remve 1 electron from each atom in a mole of atomes in the gaseous state (KJmol-1)

                              X(g) -----> X+(g)  +  e-

ionisation of Na: the energy will vary with different elements

                             Na(g) ----> Na+(g) +  e-

factors affecting ionisation energy:

  • electron shielding: the more number of shells, the easier the outer electrons to lose
  • chage on the nucleus: the more protons, the more srongly electrons are attracted to it
  • distance


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