AP Chemistryeasymcq1 pt
Why do ionic solids conduct electricity when molten but not when solid?
A.Melting frees ions to move
B.Melting releases free electrons
C.Heat converts the ions into atoms
D.Melting breaks covalent bonds
Explanation
Core Concept
Conduction requires mobile charge carriers. In the solid lattice, ions vibrate in fixed positions; melting lets cations and anions flow, so current passes.
Correct Answer
AMelting frees ions to move
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