explain why the electronegativity of fluorine is greater than that chlorine
The electrons in chlorine are further away from the nucleus and in a higher energy level (3p for chlorine as apposed to 2p for fluorine). Chlorines electrons are better shielded and so feel less nuclear charge. Thus are less attracted to the nucleus, therefore electronegativity is lower.
MG
Related Chemistry A Level answers
All answers ▸why does silicon dioxide have such a high melting/boiling point?
Why is Phenol more reactive than Benzene in electrophilic substitution reactions?
Compare the structures of Diamond and Graphite, making references to the bonding, the shape of the structures, and location of the electrons within the structures. Account for the fact that graphite conducts electricity and diamond does not.
Rank the following acids according to acid strength, strongest to weakest: HF, HCl, HBr. Explain your reasoning.