Chapter 2 - Atoms, Molecules, and Ions - Exercises - Page 77: 2.69c

Cation Name: Potassium Cation Charge: 1+ Anion Name: Perchlorate Anion Charge: 1-

Potassium needs to lose one electron to have a full outer shell. Therefore, it has a 1+ charge. ClO$_{4}^{-}$ is an ion found on any list of ions, is called Perchlorate and has a 1- charge.