All of the following species have a dative bond except:
Correct answer: A. OH⁻
- A. OH⁻
- B. BF₄⁻
- C. NH₄⁺
- D. H₃O⁺
Explanation
A dative (or coordinate covalent) bond involves one atom providing both electrons for the shared pair. In the hydroxide ion (OH⁻), the bond is a standard covalent bond, and the negative charge results from an extra electron on the oxygen atom, not a dative bond.
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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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