Why do ionic compounds have high melting and boiling points?
This is because of the strong attractive electrostatic forces holding the oppositely charged ions together and a large number of ionic bonds in the crystal lattice. These require a lot of thermal energy to overcome and hence have both high melting and boiling points.
DT
Related Science GCSE answers
All answers ▸Describe the mechanism by which antibiotic resistance develops in bacteria?
What is the difference between aerobic and anaerobic respiration?
What are the three types of radiation?
How do I balance an equation for a reaction, such as complete combustion of ethene?