Practice Quiz

Praxis II: Chemistry Exam Prep

Category - Chemistry

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Which of the following is false about the ionic character of bonds?
  1. Covalent bonds never have ionic character
  2. Covalent bonds have some ionic character because not all electron sharing is equal
  3. Due to partial ionic character, one atom in a covalent bond will have a partial positive charge
  4. Due to partial ionic character, one atom in a covalent bond will have a partial negative charge
  5. The ionic character of a bond is due to the polarity of the atoms in the bond.
Explanation
Answer: A. Polarity in atoms lead to dipoles, where one atom in a bond has a partial positive charge and the other has a partial negative charge. This occurs because the electrons are not shared equally; they are attracted/pulled to one atom of the bond more than the other. Thus, B, C, D, and E are all facts about bonds. A is false because some covalent bonds do have ionic character because of B-E.
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