Answer: Copper (I)
Step-by-step explanation:
The number of protons in an atom directly correlates to the identity of the atom, so this ion is copper. The charge relates to the balance of protons and electrons, so this ion has one more proton than it does electrons, making our final answer Copper (I). (Make sure to state the charge of transition elements! In this case our charge is 1+, so we'll put a (I) after the name!)