Forces | Assessment Review
A 20-minute Grade 12 chemistry review lesson focused on the main intermolecular and intramolecular forces students need to identify and compare on an assessment. The lesson uses quick recall, paired practice, and a short exit check to reinforce understanding.
| Term | Definition |
|---|---|
| Intermolecular forces | Attractions between particles or molecules. |
| Intramolecular forces | Forces within a compound, such as covalent or ionic bonding. |
| Hydrogen bonding | A strong intermolecular force involving hydrogen bonded to N, O, or F. |
| Dipole-dipole force | Attraction between polar molecules. |
| London dispersion forces | Weak attractions caused by temporary electrons shifts in all particles. |
| Ionic bonding | Attraction between oppositely charged ions. |
| Metallic bonding | Attraction between metal ions and a sea of delocalized electrons. |
Display 3 quick questions: identify the force in NaCl, H2O, and CO2. Call on students for fast answers.
Respond verbally and write one answer on paper.
Review the main force types and key clues for recognizing each one. Emphasize how polarity and molecular structure affect the type of force.
Listen, annotate notes, and ask clarifying questions.
Work through 3 assessment-style items with the class. Model how to underline key words and justify answers with evidence.
Solve each item with a partner and share responses.
Give 2 short questions for independent completion. Circulate and support students who need help.
Complete questions individually and show work.
Review answers quickly, address common errors, and clarify any misunderstandings.
Self-correct using teacher feedback.
End by asking students to state one clue they will use on the assessment to identify a force correctly. Reinforce that structure, charge, and polarity are the main decision points.
Formative assessment through oral responses, guided practice accuracy, and two independent review questions completed at the end of class.