Answer
It is defined by the number of bonding and lone pairs of electrons on central atoms. It is important because it can be used for prediction of physical and chemical properties of the molecule.
Work Step by Step
Explained in answer
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.