The molecular shape of a molecule with three bonded atoms and one lone pair electron on the central atom will be:
Correct answer: C. Trigonal Pyramidal
- A. Trigonal planar
- B. Tetrahedral
- C. Trigonal Pyramidal
- D. Linear
Explanation
Option C is correct. If there are three bond pairs and one lone pair of electrons then the molecular shape of that molecule is trigonal pyramidal. An example of such a molecule is NH3. Its geometrical structure is given below. Trigonal planar = 3 bond pairs. Tetrahedral = 4 bond pairs. linear = 2 bond pairs.
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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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