Compound Structure and Properties
Seven topics on why atoms stick together and what that predicts. Bonding as a spectrum of electron sharing, the potential-energy curve behind every bond, the lattices of ionic solids and the electron sea of metals, drawing Lewis diagrams, ranking resonance structures by formal charge, and predicting molecular shape with VSEPR.
Equations For every problem in this unit
60 open-ended problems.
Read the question, work it out, then flip the card to compare your reasoning to the worked solution. Mark each card so you can return to the ones that still bite.
Switch to All, work through some cards, and tag them as Got it or Revisit.
Test the unit.
Twenty mixed items pulled from across all 7 topics. Identifies which misconceptions still bite when you cannot see which topic the question came from.
Check what stuck.
Units 1 through 2, drawn evenly so earlier units get the same share as this one. Twenty questions or a full 60-question section, your choice. Even coverage means this is a retention check rather than a score estimate.