If you want to change the charge of your atom you can either

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.

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hloride, what is the mass of calcium in

explanation: