Why do ionic compounds have high melting and boiling points?
A large amount of energy is needed to overcome the strong electrostatic attractions between oppositely charged ions in the lattice.
Cambridge IGCSE (9–1) Chemistry 0971 (Extended) (2026–2028) · 2.4
Revise Cambridge IGCSE (9–1) Chemistry 0971 (Extended) (2026–2028) specification point 2.4, Ions and ionic bonds, with free active-recall flashcards. Flip through the set or review every question and answer below.
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Why do ionic compounds have high melting and boiling points?
A large amount of energy is needed to overcome the strong electrostatic attractions between oppositely charged ions in the lattice.
What must a substance contain to conduct electricity?
Charged particles that can move.
Why does a solid ionic compound conduct electricity poorly?
Its ions are fixed in place and cannot move.
Why does an ionic compound conduct electricity when molten or dissolved in water?
Its ions can move in these states.