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An oxygen molecule holds its two atoms together with two shared pairs. Compared with a single bond between the same atoms, that bond is:
ALonger but stronger
BEqual in every way
CShorter and stronger
DLonger and weaker
Answer & Solution
Correct answer: C. Shorter and stronger
1. Two shared pairs pull the nuclei closer than one pair can.
2. Closer nuclei mean a shorter bond, and more shared electrons mean a firmer grip.
3. A double bond is therefore shorter and stronger than a single bond.
_Source: OpenStax Chemistry 2e, Chapter 7, Chemical Bonding and Molecular Geometry._
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