Question

Which ion is formed when an atom of fluorine (F) gains one electron?

F–1
F–2
F+1
F+2

Answer 1

The answer is F-1since it is gaining therefore you can take this as electron affinity.

Answer 2

Answer: Option (a) is the correct answer.

Step-by-step explanation:

When an atom or element gains an electron then the atom acquires a negative charge whereas when an atom or element loses an electron then it acquires a positive charge.

for example, atomic number of fluorine is 9 and when it gains one electron then fluorine atom acquires a negative charge. Hence, neutral atom of fluorine changes into
`F^(-1)` ion.

Thus, we can conclude that
`F^(-1)` ion is formed when an atom of fluorine (F) gains one electron.