Which of the following metals will weigh the most if pieces are equally sized?

• A. Gold
• B. Copper
• C. Lead
• D. Cast iron

Answer: (A)

Gold is the correct answer because it has a significantly higher density compared to the other metals listed. Density is a key factor in determining weight when the pieces are of equal size. Gold has a density of about 19.32 grams per cubic centimeter, making it one of the densest metals.

In comparison, copper has a density of approximately 8.96 grams per cubic centimeter, lead has a density of about 11.34 grams per cubic centimeter, and cast iron has a density that typically ranges from 6.5 to 7.8 grams per cubic centimeter, depending on its specific type and formulation. When all pieces are sized equally, the higher density of gold results in greater weight, making it the heaviest among the options provided.

Understanding the concept of density is crucial when comparing the weights of metals in this context, as it determines how much mass is contained in a given volume.