Your fourth and last midterm test is tomorrow and covers electricity, electric circuits, quantum physics, and nuclear physics. Last week you were given the review problems for the electricity and electric circuits part of the test. Here is the rest.
Chapter 38
3. What is a quantum of light called?
6. What is the photoelectric effect?
20. Can the momenta and positions of electrons in an atom be measured with certainty?
21. What does it mean to say that a certain quantity is quantized?
24. Which photon has the most energy - one from infrared, visible, or ultraviolet light?
Chapter 39
30. What do different isotopes of a given element have in common? How are they different?
37. If a sample of radioactive material has a half-life of one week, how much of the original sample will be left at the end of the second week? The third week? The fourth week?
42. a. State the numbers of neutrons and protons in each of the following nuclei:
Li-6, C-14, Fe-56, Hg-201, and Pu-239 (Note: In the textbook these are written in the isotope format we learned in class, with the atomic number on the lower left and the atomic mass number on the upper left. I could not get the formatting correct to reproduce that here).
b. How many electrons will typically surround each of these nuclei?
45. What element results when radium-226 decays by alpha emission? What is the atomic mass of this element?
Chapter 40
2. What is the role of a neutron in nuclear fission?
4. Why does a chain reaction not occur in uranium ore?
Thursday, May 14, 2009
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