Answer:
Add a proton or an electron
Explanation:
If you want to change the charge on an atom, you can either add a proton or an electron.
The charge on an atom is the difference between the number of protons and electrons it carries.
When you add an electron to a neutral atom, it becomes negatively charged because the number of electrons is now more.
When you add an extra proton to a neutral atom, it becomes positively charged because the number of protons is now more. But when you add a proton to an atom, the atom becomes another element.
