Which molecule has the longest bond length due to a single bond between identical atoms?
I₂ has a single bond with a bond length of ~267 pm, longer than F₂ (142 pm), Cl₂ (199 pm), or Br₂ (228 pm) due to larger atomic size.
Ref: NCERT Class 11 Chemistry > Chapter 4: Chemical Bonding and Molecular Structure > Topic: Kossel-Lewis Approach and Octet Rule and Lewis Structures