Question

# Which of the following properties do not match with elements of the halogen family?

A
They have seven electrons in their valence shell
B
They are highly reactive chemically
C
They are metallic in nature
D
They are diatomic in their molecular form

Solution

## The correct option is D They are metallic in natureHalogens have $$ns^2p^5$$ configuration so they have $$7$$ valence shell electrons.As they have $$7$$ valence electron so they have a high tendency to gain one electron and are non-metallic.Due to incomplete octet, they are highly reactive and exists as diatomic in molecular form as $$X_2$$.Hence, the correct option is $$\text{C}$$Chemistry

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