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 ▸How do you answer a long answer question on how buffer systems work?
Why does the ionisation energy of period 2 elements increase along the period, but drop for boron and oxygen?
What evidence is there to support the delocalised model of benzene over Kekulé's model?
Explain: 1. Why butanoic acid has a higher boiling point than butan1-ol? 2. Why carboxylic acids of short chain length are more soluble in water than those with longer carbon chain length?