Alberta Science 10Teaching resource · Alberta POS aligned

Units / Unit A / Periodic Table Patterns and Combining Ratios

Periodic Table Patterns and Combining Ratios

Use the periodic table to explain how and why elements combine in specific ratios (A-GO2-SO3, SO4).

Present slides (8)Student view preview75 minutes suggested

Lesson plan — step by step

  1. 1

    Prepare

    Print ion sheet; open ptable.com on projector.

  2. 2

    Set purpose

    Display learning-intent slide; clarify success criteria and POS tags.

  3. 3

    Teach

    Walk through 8 slides in order—use talk tracks and questions in presenter notes.

  4. 4

    Formative check

    Ion charges: Groups 1, 2, 16, 17 ion charge exit ticket.

  5. 5

    Close

    Exit slide; assign optional review of student notes online.

Materials

  • Print ion sheet; open ptable.com on projector.

Program of Studies tags

General outcomes

A-GO2

Specific outcomes

  • A-GO2-SO3
  • A-GO2-SO4

Teacher overview

Connect periodic patterns to ion formation and formula writing.

Before class

  • Print ion sheet; open ptable.com on projector.

Common misconceptions

  • Students may think group number always equals valence for all groups without transition metals context.

Formative checks (classroom)

  • Ion charges

    Groups 1, 2, 16, 17 ion charge exit ticket.

    Look for: Correct charges for Na+, Mg2+, O2-, Cl-.

Slide outline

  1. 1. [hook] Why does sodium chloride always have the same formula? · ~3 min
  2. 2. [learning-intent] POS focus · ~2 min
  3. 3. [concept] Periodic table organization · ~6 min
  4. 4. [concept] Ions and combining ratios · ~6 min
  5. 5. [worked-example] From ions to formula · ~7 min
  6. 6. [guided-practice] Formula practice · ~8 min
  7. 7. [sts] Communicating formulas · ~4 min
  8. 8. [exit] Next: IUPAC names · ~2 min