Materials and Components
On the basis of the type of chemical bonds, solids may be classified into

Ionic crystals
Ionic crystal, valence crystals and metals
Ionic and valence crystals
Ionic crystals, valence crystals, metal and vander wall crystals

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Materials and Components
The residual resistivity of a binary alloy at 0 K is

Sum of residual resistivities of component metals
Difference of residual resistivities of component metals
Product of residual resistivities of component metals
Dependent on the concentration of minor component in the alloy

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