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Which mechanism restricts electron mobility in ionic crystal lattices?

A)Phonon scattering impedes hopping conduction
B)Band gap promotes electron delocalization
C)Resonance enables rapid wave transport
D)Polaron formation enhances electron tunneling

💡 Explanation

Phonon scattering restricts electron mobility in ionic crystal lattices because the lattice vibrations disrupt the periodic potential, thus impeding the hopping conduction of electrons from ion to ion, rather than allowing band-like propagation.

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