Final answer:
The metal with low density and low melting point among the options is Zinc. It has the properties of being malleable and ductile but has less electrical conductivity in its pure form compared to copper or gold.
Therefore the correct answer is option D Zinc.
Step-by-step explanation:
You are hired as a scrap metal dealer and a customer wants to sell you a piece of precious scrap metal. If the metal in question has a low density and low melting point, the correct answer would be D) Zinc. Zinc has a relatively low melting point and low density compared to other metals like copper, gold, and nickel.
Unlike the other metals listed, which are heavier and have higher melting points, zinc can be melted and cast into shapes at moderate temperatures. Its properties include being malleable, ductile, and good conductivity of heat and electricity when alloyed; however, it is important to note that pure zinc has less electrical conductivity compared to metals like copper and gold.