Resonance Returns-Choosing Major/Minor Contributors (Worksheet Solutions Walkthrough)

In this solution walkthrough, we go through the Resonance Returns-Choosing Major/Minor Contributors worksheet on jOeCHEM (worksheet and solution sheet linked below).
Worksheet: worksheets.joechem.io/workshee...
Worksheet Solution: worksheets.joechem.io/workshee...
Worksheet Solution Walkthrough video: joechem.io/videos/wksht-soln-...
Study Guide: worksheets.joechem.io/study-gu...
Related instructional videos on jOeCHEM:
Resonance (again!)--Identifying Major/Minor Structures - joechem.io/videos/186
Learning Resonance - joechem.io/videos/5
========================================
Follow jOeCHEM on social media:
If you're having an organic blast, please SUBSCRIBE: kzbin.info?sub...
LIKE and FOLLOW across social media:
Facebook - / joechemio
Instagram - / joechem_io
TikTok - / joechem

[@dicle743]

Thank you for the video. It helped a lot but I am a bit confused about the chlorite example. It doesn’t obey the octet rule since Cl atom has 10 electrons and it expanded its octet. Is it also possible for other elements?

[@jOeCHEM]

Hey, Dicle! So normally it would; HOWEVER, chlorine, being in the 3rd row of the periodic table, can expand its octet and stuff electrons beyond 8 valence electrons in its 3d subshell. This type of example is a bit weird specifically for organic chemistry (in my opinion, this is more of a gen-chem geared problem), but I included it here to provide a more involved resonance/formal charge example. Check 26:36 of the video, and let me know if re-watching that part clears up some confusion.