Halogen elements are those which are-monatomic and form mathrm-X- ionsdiatomic and form X- ionsdiatomic and form mathrm-X- ionsmonoatomic and form X- ions

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Halogen atoms have 7 electrons in their valence shell- So- they require only one electron to complete its octet- Thus- halogens are present in a diatomic form in order to complete their octet by sharing of electrons- Also-x-e-x2212-x2192-x-x2212-xA0-stable-xA0-for-xA0-Halogens-xA0-

Halogen elements are those which are:
monatomic and form $X^{-}$ ions
diatomic and form $X^{- -}$ ions
diatomic and form $X^{-}$ ions
monoatomic and form $X^{- -}$ ions

Halogen atoms have 7 electrons in their valence shell. So, they require only one electron to complete its octet. Thus, halogens are present in a diatomic form in order to complete their octet by sharing of electrons. Also,
$x + e^{-} \to x^{-} (s t a b l e f o r H a l o g e n s)$

Halogen elements are those which are:monatomic and form X− ionsdiatomic and form X−− ionsdiatomic and form X− ionsmonoatomic and form X−− ions

Halogen atoms have 7 electrons in their valence shell. So, they require only one electron to complete its octet. Thus, halogens are present in a diatomic form in order to complete their octet by sharing of electrons. Also,x+e−→x− (stable for Halogens)

Halogen elements are those which are:
monatomic and form $X^{-}$ ions
diatomic and form $X^{- -}$ ions
diatomic and form $X^{-}$ ions
monoatomic and form $X^{- -}$ ions

Halogen atoms have 7 electrons in their valence shell. So, they require only one electron to complete its octet. Thus, halogens are present in a diatomic form in order to complete their octet by sharing of electrons. Also,
$x + e^{-} \to x^{-} (s t a b l e f o r H a l o g e n s)$