Homework Answers
Number of lines present in the structures of given elcreone geometry in each case are equal to their respective electron units on central atom.
When the number of lines are equal to number of elctron pairs on central atom, then the molecule will not contain any lone pair of electrons on central atom. (It means all the electrons are participating in bond formation, leaving no lone pair of electrons).
Example:
In the given first case, 2 elctron units on central atom are mentioned, and the given lines in geometry of molecule also only two.
Similarly in remaining cases also.
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