Ionisation energy

  • Created by: ath99
  • Created on: 04-11-19 13:54

Ionisation energy

Ionisation energy is a measure of the energy needed to pull (remove) a particular electron away from the attraction of the nucleus. This is affected by:

•The charge on the nucleus.

The more protons there are in the nucleus, the more positively charged the nucleus is, and the more strongly electrons are attracted to it.

•The distance of the electron from the nucleus.

Attraction falls off very rapidly with distance. An electron close to the nucleus will be much more strongly attracted than one further away.

•Whether the electron is on its own in an orbital or paired

Two electrons in the same orbital experience a bit of repulsion from each other. This compensates the attraction of the nucleus, so that paired electrons are removed rather more easily.

-The shielding effect describes the balance between the pull of the protons on electrons…


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