Which of the following molecules has the largest number of shared pairs of electrons?
Correct answer: A. C2H4
- A. C2H4
- B. N2
- C. CO2
- D. NH3
Explanation
C2H4 has the largest number of shared electrons as it has 12 valence electrons in total which are all part of a shared pair (4 electrons between the two central carbons and 2 electrons each between 4 carbon-Hydrogen bonds). N2 has 3 shared pairs of electron (6 electrons in total) CO2 has 4 shared pairs of electrons (8 electrons in total). NH3 has 3 shared pairs of electrons. (6 electrons in total)
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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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