State and explain the trend in boiling points of chlorine, bromine, and iodine
Boiling point increases down the group, because of increasing strength of van der Waals (intermolecular) forces. More energy is required to break van der Waals (intermolecular) forces.Follow up questions could be:1) What are van der Waals forces and what determines their strength?2) Why do all halogens have similar reactivity?
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Related Chemistry A Level answers
All answers ▸What is meant by the 'First Ionisation Energy' of an element?
i)Explain why first ionisation energy shows a general tendency to increase across a period? ii)Using period 3 as an example, which elements show irregularities in this trend and why?
What is periodicity?
What is Ionisation Energy and the three factors that affect it? 2)State and explain the general trend in first ionisation energies for the Period 3 elements.