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CBSE - XI Science - Chemistry - Chemical Bonding and Molecular Structure

What is a lone pair?

Asked by sharookh shahul 26th September 2013, 10:18 PM
Answered by Expert


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.
Answered by Expert 27th September 2013, 9:11 AM

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