Thermal Conductivity and Lattice Impurities
Which of the following best explains, at the atomic level, why introducing impurity atoms into a pure metal significantly reduces its thermal conductivity?
A
Impurity atoms increase the average atomic mass of the material
B
Impurity atoms increase the material’s specific heat capacity
C
Impurity atoms always decrease the material’s density
D
Impurity atoms disrupt the lattice, scattering phonons and electrons
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