Select the electron domain geometry and the molecular geometry for an ammonia molecule, NH3. Check all of the boxes that apply. You may use the periodic table if needed.

Nitrogen has 5 valence electrons. In NH3, it forms three N–H bonds and has one lone pair, giving four electron domains around nitrogen. Four electron domains arrange tetrahedrally, while the three bonded atoms form a trigonal-pyramidal molecular shape. Therefore, the correct choices are tetrahedral electron domain geometry and trigonal-pyramidal molecular geometry.

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