Exercise1

-Differentiate the three principle bonding mechanisms in solids.

-Aluminum and silicon are side by side on the periodic table. Compare the melting temperatures of the two elements and explain the difference in terms of atomic bonding.

-An aluminum-alloy bar of length 2 meters at room temperature (300 K) is exposed to a temperature of 100C ( = 25 x 10^-6 K^-1). What is the change in the length of this bar at 100C in millimeters?