Wed March 02, 2011 By: Natasha Banerjee

which is more reactive Cl or F?

Expert Reply
Wed March 02, 2011
Dear Student
They are both from the same group, yes. But F is above Cl so it means that the F's valence shell is nearer the nucleus (or at "lower level") than the valence shell in Cl, which causes F to have more effective nuclear charge.
This fact explains the more affinity for electrons in F in relation to Cl and therefore F is more reactive.
We hope that clarifies your query.
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