Chapter 9, Problem 48QRT

On the basis of the description given, classify each of these solids as molecular, metallic, ionic, network, or amorphous, and explain your reasoning.

1. (a) A brittle, yellow solid that melts at 113 °C; neither the solid nor the liquid conducts electricity
2. (b) A soft, silvery solid that melts at 40 °C; both the solid and the liquid conduct electricity
3. (c) A hard, colorless, crystalline solid that melts at 1713 °C; neither the solid nor the liquid conducts electricity
4. (d) A soft, slippery solid that melts at 63 °C; neither the solid nor the liquid conducts electricity