Answer
1 mol of $copper$ has the greater mass.
Work Step by Step
- 1 mol copper:
1 mol copper = $6.022 \times 10^{23}$ copper atoms.
Since we are comparing 2 quantities of the same type of atom ($Cu$), the one with the higher number of atoms has the greater mass.
$6.022 \times 10^{23} > 1$
Therefore:
In mass: 1 mol copper > 1 copper atom.