Periodic Trends
Investigating patterns in atomic radius, ionization energy, and electronegativity.
Key Questions
- Explain why certain groups of elements react explosively with water while others are completely inert.
- Analyze how the size of an atom changes as you move across a row in the periodic table.
- Predict the reactivity of an unknown element based on its position in the periodic table.
Ontario Curriculum Expectations
Suggested Methodologies
Ready to teach this topic?
Generate a complete, classroom-ready active learning mission in seconds.
Planning templates for Science
5E Model
The 5E Model structures lessons through five phases (Engage, Explore, Explain, Elaborate, and Evaluate), guiding students from curiosity to deep understanding through inquiry-based learning.
unit plannerThematic Unit
Organize a multi-week unit around a central theme or essential question that cuts across topics, texts, and disciplines, helping students see connections and build deeper understanding.
rubricSingle-Point Rubric
Build a single-point rubric that defines only the "meets standard" level, leaving space for teachers to document what exceeded and what fell short. Simple to create, easy for students to understand.
More in The Nature of Matter
Early Atomic Models
Tracing the evolution of atomic models from ancient philosophy to Dalton's atomic theory.
3 methodologies
Rutherford and Bohr Models
Understanding the discovery of the nucleus and the planetary model of the atom.
3 methodologies
Quantum Mechanical Model
Exploring the modern understanding of electron probability and orbitals.
3 methodologies
Subatomic Particles and Isotopes
Understanding protons, neutrons, electrons, and the concept of isotopes.
3 methodologies
Electron Configuration and Valence Electrons
Determining electron configurations and identifying valence electrons for chemical reactivity.
3 methodologies