A cation is a negative electrode.
negatively charged ion.
positively charged ion.
positive electrode

Explanation:

positively charged ion

Each electrode attracts ions that are of the opposite charge. Positively charged ions, or cations, move toward the electron-providing cathode, which is negative; negatively charged ions, or anions, move toward the positive anode.

increased stability in the completion of fluorine's outer shell.

i think the answer is terrae but not 100 percent sure. ▓▬▬ §