QQuestionChemistry
QuestionChemistry
"Select the electron domain geometry and the molecular geometry for an ammonia molecule, NH₃. Check all of the boxes that apply.
trigonal-planar electron domain geometry
trigonal-planar molecular geometry
trigonal-pyramidal electron domain geometry
trigonal-pyramidal molecular geometry
tetrahedral electron domain geometry
tetrahedral molecular geometry"
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Answer
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Step 1: Determine the electron domain geometry for an ammonia molecule (NH₃).
An ammonia molecule has one central nitrogen atom (N) bonded to three hydrogen atoms (H) and has one lone pair of electrons. The nitrogen atom in the ammonia molecule is bonded to three other atoms, so it has three electron domains. Therefore, the electron domain geometry for an ammonia molecule is trigonal-pyramidal.
Step 2: Determine the molecular geometry for an ammonia molecule (NH₃).
The molecular geometry is determined by the arrangement of the atoms (not the lone pairs) around the central atom. In this case, there are three hydrogen atoms and one lone pair of electrons around the central nitrogen atom. Since there are no other atoms or lone pairs on the nitrogen atom, the molecular geometry is the same as the electron domain geometry, which is trigonal-pyramidal.
Final Answer
- Trigonal-pyramidal electron domain geometry (checked) - Trigonal-pyramidal molecular geometry (checked) Note: The other options do not apply to an ammonia molecule.
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