Question

Copper and nickel have face-centered cubic structure and the following data are given:

Element	amu	Atomic Radius (nm)	Temperature (°C)
Cu	65	0.1278	1084.5
Ni	59	0.1246	1455

1. Which one would have a higher bond energy, Cu or Ni?
2. These metals make a complete solid solution. Give as many reasons for their complete solubility.
3. The Cu-Ni solid solution would have a (a) higher, (b) lower, and (c) the same as the pure metals {Choose one}:

            Hardness ______

            Electrical conductivity ______

            Thermal conductivity ______

            Entropy _____

4. Calculate the lattice parameter (a) of the unit cell of Cu.

Answer 1