Which type of crystalline solid has constituent particles held by **electrostatic** forces between oppositely charged ions?
AMolecular solids
BCovalent network solids
CIonic solids (e.g. NaCl, KCl, CaF₂)
DMetallic solids
Answer & Solution
Correct answer: C. Ionic solids (e.g. NaCl, KCl, CaF₂)
Ionic solids: cations and anions held by Coulomb attraction. Hard, brittle, high melting points; non-conductors in solid state but good conductors when melted or dissolved.
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