Question

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Compare hydrogen with halogen on the basis of: ion formation

Answer 1

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Each of them can form a anion by gaining an electron.
$\text{H}$ → ${\text{H}}^{+}$ + ${\text{e}}^{-}$
$\text{F}$ + ${\text{e}}^{-}$ →${\text{F}}^{-}$