•• Consider a hypothetical element that forms a solid with bands as shown in Fig. 1.(a) Su...

•• Consider a hypothetical element that forms a solid with bands as shown in Fig. 1.(a) Suppose that the isolated atom has configuration 1s22s2. If its equilibrium separation is r0 = a, is the solid a conductor or an insulator? What if r0= b? Answer both questions for the case that the atomic configuration is (b) 1s22s22pl and (c) 1s22s22p6.

FIGURE 1