Mystery 2: Could you transform something worthless into gold?

1. When the steel nail was left with the copper pennies in a bag of vinegar and salt, the nail turned copper-colored. What happened? The nail was transformed from steel to copper. The nail was covered with a thin layer of copper. A steel layer was removed from the nail, showing copper underneath. 2. How did the experiment with the steel nail help you understand the story of the alchemist who changed the king's sword to copper? 3. The alchemists claimed that "ordinary metals can be transformed into gold." Do you agree with this claim? Why or why not?