Question

Which of the following is not true about the halogens?

A

All of them have seven electrons in their outershell

B

They either gain an electron by forming an ionic bond or form a covalent compound by electron sharing

C

All exhibit variable valency

D

All form diatomic molecules

Easy

Solution

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Correct option is C)

Fluorine does not exhibit variable valency because it does not have vacant d orbitals. 

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