a pure copper penny contains appoximatel 3.0 x 10 to the 22 copper atoms. use the definitions in the previous problem to determine how many______of copper atoms are in a penny.

I don't understand the question. Perhaps it would help if I knew the nature of the previous problem to which this post refers.

To determine the number of ______ atoms in a penny, we need to know what element or substance to fill in the blank. Could you please specify the word or element you want to use in place of the blank?