Explain why sulfur deviates from the general trend in ionisation energies across period 3.
Sulfur has the electronic structure [Ne]3s2 3p4. This means there are 2 electrons in the same p orbital. These repel each other making it easier to remove the electron causing the ionisation energy to be lower than expected.
AM
Related Chemistry A Level answers
All answers ▸How does a catalyst and increasing temperature affect the rate of reaction?
What is the mechanism for the nucleophilic substitution of a halogenoalkane?
How do I calculate the Gibbs free energy change for a reaction when given the entropy change, enthalpy change and the reaction conditions>
What is nucleophilic substitution and how can I draw a mechanism to show this reaction taking place?