A copper foil is made from copper, absolutely free of impurities. Which term or terms could be used to describe this sample of copper

pure

I agree with Damon's answer. I think Cu would also work.

TELL ME THE ANSWER!

A copper foil is made from copper, absolutely free of impurities.

Which term or terms could be used to describe this sample of copper?

element

The term that could be used to describe a copper foil free of impurities is "pure copper." Additionally, if the copper foil has a high level of purity, it can also be described as "highly pure copper." These terms indicate that the copper foil is composed solely of copper atoms and does not contain any unwanted substances or impurities.