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AS Level Chemistry

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Question:

Why does shielding effect of inner electrons , influence ionisation energy (5)

Author: Phillanie Jacobs



Answer:

- Electrons are negatively charged, so they repel each other - Electrons in full inner shells repel electrons in outershells - Full inner shells of electrons prevent outer electrons prevent outer electrons from feeling full nuclear charge, this is called shielding - Greater the shielding of outer electrons by the inner electrons shells, the lower the attractive force between the nucleus and the outer electrons. - Ionisation energy is lower as the number of full electron shells between outer electrons and nucleus increases


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