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The H-N-H bond angle in ammonia (NH₃) is approximately 107 degrees due to the presence of a lone pair of electrons on the nitrogen atom. This lone pair exerts a repulsive force that pushes the hydrogen atoms closer together, resulting in a trigonal pyramidal molecular geometry rather than a tetrahedral one. The angle is slightly less than the ideal tetrahedral angle of 109.5 degrees because of the greater repulsion exerted by the lone pair compared to the bonding pairs.

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4mo ago

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