SCH4U - Chemistry 12 (2024-25) - A

SCH4U – Lesson Plan 1-2

Quantum Mechanical Model of the Atom

Lesson Big Idea:

The Bohr-Rutherford model of the atom helped us to understand the structure of the atom on a basic level, however the true picture of atomic structure is more complex.  The quantum model of the atom is a model that describes characteristics of orbitals and electrons using a numbering and lettering system that allows us to describe electron orbitals in terms of their energy, shape, orientation and electron spin.

Ministry Expectations:

C2.1: use appropriate terminology related to structure and properties of matter, including, but not limited to: orbital, emission spectrum, energy level, photon, and dipole [C]

C2.2 use the Pauli exclusion principle, Hund’s rule, and the Aufbau principle to write electron configurations for a variety of elements in the periodic table [AI, C]

C3.2 describe the electron configurations of a variety of elements in the periodic table, using the concept of energy levels in shells and subshells, as well as the Pauli exclusion principle, Hund’s rule, and the Aufbau principle

Learning Goals:

By the end of this lesson you will:

• Understand the limitations of the Bohr model of the atom.
• Know the 4 quantum numbers and the characteristics they describe
• Understand the Pauli Exclusion Principle

Success Criteria:

I know I have achieved the learning goals when I:

• Can connect quantum number values to the characteristics they describe
• Can describe atomic orbitals in terms of their energy, shape, orientation and electron spin 

Assessments:

• Check your understanding – Quiz (AfL)
• Embedded questions within learning activities (AfL)
• Journal (AaL)