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Which outcome occurs when applying pressure to bismuth?

A)Increased metallic character appears
B)Enhanced thermoelectric generation halves
C)Exciton binding energy increases tenfold
D)Phonon scattering probability declines

💡 Explanation

Pressure induces a structural transition; the electronic band structure changes favouring increased metallic bonding via *electronic band broadening*, because atomic orbitals overlap more. Therefore resistivity decreases, rather than enhancing generation, because the semiconductor bandgap diminishes.

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