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2 cards from this section. Quick, good the night before a test.
What is a lone pair?
Think about electrons that are not involved in bonds.
How many lone pairs does ammonia have?
Count how many pairs are not involved in bonding.
What is the molecular geometry of ammonia (NH₃)?
Recall the number of bonding and lone pairs.
True or False: Lone pairs take up less space than bonding pairs.
Think about their repulsion effects.
Predict the molecular geometry and bond angles of a molecule with four electron domains containing two bonds and two lone pairs.
Consider how lone pairs influence the arrangement.
Explain the polarity of a molecule with a tetrahedral shape but one lone pair on its central atom.
Think about how lone pairs can change symmetry.
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