What does ‘aromatic’ mean?

In A Level Chemistry, the word aromatic means a molecule’s structure contains at least one cyclic ring which has a delocalised pi electron cloud above and below it. This occurs from unbonded P orbital electrons becoming delocalised from their (usually carbon) atom and being spread across the whole ring structure, which stabilises the molecule. Drawing the molecule in this way is known as its resonance structure.

SL

Related Chemistry A Level answers

All answers ▸

Explain the trend of first ionisation energy down a group.


How and why does sp3 hybridization occur?


1. Why does the first ionisation energy of atoms generally increase across a period?


You have 3.51g of hydrated zinc sulphate. You heat up the zinc sulphate until all the water has evaporated from it. The weight after heating is 1.97g. Find how many H2O molecules per zinc sulphate molecule there are in the hydrated form of it.