Question

Which of the following statements is correct for the halogen elements?

• A. They are diatomic and form ions of the general formula $X^{+}$.
• B. They are diatomic and form ions of the general formula $X^{-2}$.
• C. They are diatomic and form ions of the general formula $X^{-}$.
• D. They are monoatomic and form ions of the general formula $X^{-}$.

Answer 1

The correct option is C They are diatomic and form ions of the general formula $X^{-}$.

Halogen family are diatomic and has $7$ electrons in their valence shell. So they gain one electron to complete octet and form $X^{-}$.