which ion is formed when an atom of fluorine (f) gains one electron?\nf⁻¹\nf⁻²\nf⁺¹\nf⁺²

which ion is formed when an atom of fluorine (f) gains one electron?\nf⁻¹\nf⁻²\nf⁺¹\nf⁺²
Answer
Brief Explanations:
An atom becomes negatively - charged when it gains electrons. Fluorine gains one electron, so its charge becomes - 1.
Answer:
A. $F^{-1}$