Moderate

Which covalent bond has the highest ionic character?

Correct answer: A. HF

  • A. HF
  • B. HBr
  • C. Hl
  • D. H2O

Explanation

The covalent bond with the highest ionic character is HF. This is because fluorine has the highest electronegativity of any element on the periodic table, and hydrogen has the lowest electronegativity. The difference in electronegativity between fluorine and hydrogen is 4.0, which is the largest difference of any of the choices.

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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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