3. explain how the copper cycle experiment supports the claim that copper is an element—a basic building…

Brief Explanations:

In the copper - cycle experiment, copper undergoes a series of chemical reactions but is ultimately recovered in its original form. This shows that copper's identity is conserved throughout the reactions. Since an element is a pure substance that cannot be broken down into simpler substances by chemical means, and copper maintains its elemental nature through the cycle, it supports the claim that copper is an element.

Answer:

The copper - cycle experiment supports the claim that copper is an element because copper is recovered in its original form after a series of chemical reactions, indicating its elemental identity is conserved as elements cannot be broken down into simpler substances by chemical means.