Download Chemistry 250 Chapter 4 Study Guide The Structure of the Atom

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Chemistry 250
Chapter 4 Study Guide
The Structure of the Atom
Section 4.1 Early Theories of Matter
• Compare and contrast the atomic models of Democritus and Dalton.
• Define an atom.
Section 4.2 Subatomic Particles and the Nuclear Atom
• Explain the role that the experiments of Thomson, Millikan, Chadwick, and Rutherford had in our
understanding of the atom.
• Distinguish between the subatomic particles in terms of relative charge and mass.
• Describe the structure of the nuclear atom, including the locations of the subatomic particles.
Section 4.3 How Atoms Differ
• Explain the role of atomic number in determining the identity of an atom.
• Define an isotope and explain why atomic masses are not whole numbers.
• Calculate the atomic mass of an element given the mass of its isotopes.
• Calculate the number of electrons, protons, and neutrons in an atom given its mass number and
atomic number.
Section 4.4 Unstable Nuclei and Radioactive Decay
• Explain the relationship between unstable nuclei and radioactive decay.
• Characterize alpha, beta, and gamma radiation in terms of mass and charge.
• Express radioactive decay in the form of a nuclear equation.
WebAssign is due Sunday, Sept. 26 at 10:00 pm.
Wednesday 9-15-10
In Class: Chapter 3 test
Homework: Read 4.1 and 4.2.
Thursday 9-16-10
In Class: History of the development of our knowledge of the atom.
Homework: Read 4.3. WebAssign #1 and #2.
Friday 9-17-10
Pep Rally – Mass Schedule
In Class: History of the development of our knowledge of the atom.
Homework: Read 4.4. WebAssign #3 and #4.
Monday 9-20-10
In Class: Atomic number, mass number, isotopes, atomic mass.
Homework: WebAssign #5 - #11. Do the preliminary work for Legumium Lab (separate handout).
Tuesday 9-21-10
Block Days
Wednesday 9-22-10
In Class: Legumium Lab (separate handout, no goggles or closed-toe/heel shoes required!) Complete
handout in class.
Homework: WebAssign.
Thursday 9-23-10
In Class: Radioactivity, types of radiation, stability, half-life, writing equations.
Homework: WebAssign #12-#14.
Friday 9-24-10
In Class: Review Chapter 4
Homework: Finish WebAssign, due Sunday at 10:00 pm.
Monday 9-27-10
In Class: Chapter 4 Test
Homework: TBA
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