History of the Atom

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Chapter 3 Review
A.
History of Atomic Theory
Trace the history of atomic theory and be able to discuss:
a)
b)
the improvements/innovations to the model or important conclusions made about atoms.
the experiments that lead to these as major design a power point presentation to teach
someone the models of the atom.
Your historical journey must include the following major developments in the atomic theory:
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
B.
The Wave-Mechanical Theory:
1.
2.
C.
John Dalton’s conclusions
J.J. Thompson’s model
Cathode rays and cathode ray tubes
Rutherford’s model
The major problem with Rutherford’s model
Planck’s Quantum Hypothesis
Photoelectric Effect
Bohr-Rutherford model of the atom
The problem with Bohr’s model
The Wave Mechanical Model - 4 quantum numbers – contributions of deBroglie,
Heisenberg/Born, Schröedinger, etc.
Give the name for each of the 4 atomic quantum numbers. State which property is
associated with each number and the experimental evidence used to discover each
number. State the mathematical values associated with each quantum number. (All of
this data could be organized in a chart)
Shapes of orbitals and their relationship to the 4 quantum numbers.
The Wave-Mechanical Model and the Periodic Table
1.
2.
3.
4.
Drawing Energy Level Diagrams.
Rules for adding electrons to atoms – Aufbau, Pauli Exclusion, Hund
Writing Electron Configurations (long and shorthand)
Ferromagnetism and paramagnetism, anomalous configurations, determining the ionic
charges of atoms based on electron configuration.
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