The Student Room Group

A-level Chemistry: Mechanisms

why does losing a pair of electrons only result in a decrease of 1- and not 2- as 2 electrons are lost.
Additionally, in the nucleophilic substitution of chloroethane and ammonia, why does, in the intermediate stage, the nitrogen atom has a +1 charge when in the C-N bond when it has a full outershell??? Help plsss :frown:((
A shared pair involved 1 electron from each atom/species.

The N atom has a positive charge because it has donated an electron pair, which it used to "own" so it now only has one half share of a pair of electrons, i.e. it was lost one electron.
(edited 2 months ago)
Reply 2
Original post by charco
A shared pair involved 1 electron from each atom/species.

The N atom has a positive charge because it has donated an electron pair, which it used to "own" so it now only has one half share of a pair of electrons, i.e. it was lost one electron.
Thank you

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