The Lewis representation above depicts a reaction between a halogen (blue) and a main-group element from groupÂ
In this representation, each Y atom needsÂ
Â electron(s) to complete its octet, and gains these electrons by formingÂ
Â bond(s) with atoms of X .
Â unshared electron pair(s) andÂ
Â bonding electron pair(s) in the product molecule.
The bonds in the product areÂ