SCH4U - Chemistry 12 (2024-25) - A

SCH4U – Lesson Plan 1-1

Lesson Big Idea:

The structural model of the atom has evolved over time through experimentation and observation.  Our view of the atom has developed from basic models describing the atom as a whole to the more complex models of today that consider the properties and placement of the individual components of every atom in the universe.

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]

C3.1: explain how experimental observations and inferences made by Ernest Rutherford and Niels Bohr contributed to the development of the planetary model of the hydrogen atom

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 how the model of the atom has developed over time
• Describe the experiments and conclusions that contributed to the evolution of the model of the atom
• Be able to describe the structure of an atom in terms of the nucleus, electrons and orbitals

Success Criteria:

I know I have achieved the learning goals when I:

• can explain the plum pudding, Rutherford and Bohr models of the atom
• can describe the experiments of Rutherford and Bohr and how they contributed to the current structural model of the atom

Assessments:

• Pre-skills assessment – Quiz (AfL)
• Check your understanding – Quiz (AfL)
• Rutherford Gold Foil Experiment Simulator (AaL)
• Journal
• Assignment (AoL): 5 marks: Knowledge & Understanding