Thu September 26, 2013 By: Sharookh Shahul

What is a lone pair?

Expert Reply
Vaibhav Chavan
Fri September 27, 2013
A lone pair is  a pair of electrons in the valence shell of an atom which are not bonded to another atom or molecule.
For example in water(H2O), the central oxygen atom has (1s22s22p4) six valence electrons.The hydrogen atom shares two of these six electrons in bond formation leaving four electrons as two lone pairs.So oxygen in water has two bond pairs and two lone pairs around it.
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