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SCH4U – Atomic Theory Chapter 3 Review
1. History of the Atomic Model:
a. Explain how the following scientists contributed to the development of the modern atomic
theory. Describe their model and explain limitations.
o Dalton’s Billiard Ball Model
o Thomson’s Raisin Bun Model
o Rutherford’s Nuclear Model
o Bohr’s Planetary Model
b. Explain Rutherford’s gold foil experiment and it’s significance
c. Explain atomic spectra and it’s significance to Bohr’s model
2. Quantum Mechanics:
a. The 4 quantum numbers and what they describe
b. The difference between orbits (Bohr) and orbitals
c. Pauli’s exclusion principle (no two electrons have the same 4 quantum #s)
3. Electron Configuration:
a. Aufbau principle (add electrons to lowest energy orbitals first)
b. Hund’s rule (1 electron per orbital at an energy level before adding a 2nd)
c. Draw energy-level diagrams and be able to identify elements/ions from them
d. Write electron configuration (long and short) and be able to recognize an atom/ion
4. Wave Mechanics
a. Wave/particle duality
b. Heisenberg’s Uncertainty principle  Schrodinger’s equation
c. Recognize the shapes of s, p, and d orbitals
SCH4U – Atomic Theory Chapter 3 Review
1. History of the Atomic Model:
d. Explain how the following scientists contributed to the development of the modern atomic
theory. Describe their model and explain limitations.
o Dalton’s Billiard Ball Model
o Thomson’s Raisin Bun Model
o Rutherford’s Nuclear Model
o Bohr’s Planetary Model
e. Explain Rutherford’s gold foil experiment and it’s significance
f. Explain atomic spectra and it’s significance to Bohr’s model
2. Quantum Mechanics:
d. The 4 quantum numbers and what they describe
e. The difference between orbits (Bohr) and orbitals
f. Pauli’s exclusion principle (no two electrons have the same 4 quantum #s)
3. Electron Configuration:
e. Aufbau principle (add electrons to lowest energy orbitals first)
f. Hund’s rule (1 electron per orbital at an energy level before adding a 2nd)
g. Draw energy-level diagrams and be able to identify elements/ions from them
h. Write electron configuration (long and short) and be able to recognize an atom/ion
4. Wave Mechanics
d. Wave/particle duality
e. Heisenberg’s Uncertainty principle  Schrodinger’s equation
f. Recognize the shapes of s, p, and d orbitals