Which one of the following molecules has a pyramidal structure?
Correct answer: B. NH3
- A. CH4
- B. NH3
- C. H2O
- D. C2H4
Explanation
NH3 has a pyramidal structure because the central nitrogen atom has 3 single bonds and 1 lone pair of electrons. The lone pair of electrons repel the bonding pairs of electrons, distorting the molecule into a pyramidal shape. The bond angles in NH3 are 107°.
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Chemical bonding explains molecular shape through VSEPR theory and distinguishes sigma bonds from pi bonds. Questions involve hybridization, bond angles, dipole moment and bond energy, including how electron-pair repulsion determines geometry and how bond polarity differs from the overall polarity of a molecule.
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