Explain why chlorine has a lower boiling point than Bromine. (2 marks)
Chlorine molecules are smaller than bromine molecules in size, therefore, the van der Waals forces (intermolecular forces) are weaker between Cl2 molecules than compared to Br2 molecules.
JB
Related Chemistry A Level answers
All answers ▸How does the reactivity of group 2 elements change down the group, and what is the cause of this trend?
The ionic product of water, Kw = 2.93 × 10−15 mol dm−6 at 10 °C. Calculate the pH of a 0.0131 mol dm−3 solution of calcium hydroxide at 10 °C Give your answer to two decimal places.
Calculate the pH change when water is added to 25.0 ml of 0.250M NaOH to form a 1.00l solution.
Describe and explain the trend in first ionisation energy down group 2 of the periodic table.