Give reasons for the following:
$(a)$ Generally,metals are not found in their free state.
$(b)$ Metals are good conductors of heat.

(N/A) Metals are chemically reactive in nature. They readily react with oxygen,sulfur,and other elements to form compounds such as oxides,sulfides,halides,carbonates,and sulfates. Due to this high reactivity,they are rarely found in their free (native) state in nature.
$(b)$ Metals are good conductors of heat because they possess free electrons. These free electrons move throughout the metallic lattice,effectively transferring kinetic energy from hotter regions to cooler regions,which facilitates the rapid conduction of heat.