Answer and Explanation:
a. Gold is a metal that has very useful physical properties to be transformed into useful objects for society. These characteristics are the ability to be malleable and ductile at the same time, in addition to being a good conductor of heat and electricity and having a large surface area per volume of solution. This makes gold used as electrical wire, jewelry and utensils.
b. both are excellent conductors of electricity, in addition to being solid at room temperature. The ability to be a good producer of electricity allows both to be used in various electronic systems.