Chemistry
Chapter 4
Reading Assignments
Section 4.1 & 4.2 p. 102- 114
1. What is matter composed of?
2. What did Democritus believe about the structure of matter?
3. What are the five key points of Dalton's atomic theory?
4. What was the primary difference between Democritus’ "ideas" and Dalton's Theory?
5. What parts of Daltons Theory proved to be incorrect?
6. How is an atom defined?
7. What is a cathode ray tube?
8. What shocking discovery did scientists make using the cathode ray tube?
9. What was Millikan's contribution to understanding atomic structure?
10. What was Rutherford's contribution in understanding nuclear structure?
11. Where is most of the atoms mass located?
12. Why is an atom electrically neutral?
13. Describe the structure of a typical atom and compare the charge and relative weight of each of the subatomic particles.
Section 4.3 p. 115 - 121
1. How many elements are on the Periodic Table?
2. What is the number of protons in an atom referred to as?
3. How is the periodic Table organized?
4. What is the overall charge on the atom? Why?
5. What is an isotope?
6. How is the chemical behavior of an atom determined?
7. What is the mass number?
8. What is an atomic mass unit?
9. Why does atomic mass not equal a whole number since protons and neutrons each weigh one amu?
10. Be able to work practice problems 18 and 19; and review questions 23 and 24 on page 121.
Section 4.4 p. 122 - 124
1. What is a nuclear reaction?
2. Define the terms radioactivity and radiation.
3. What happens when an atom emits radiation?
4. What is radioactive decay?
5. Know the charges and make up of alpha, beta and gamma radiation.
6. Be able to recognize an alpha decay equation.
7. Be able to recognize a beta decay equation.
8. Be able to recognize a gamma ray equation.
9. Why are some atoms stable and others not?
10. Why are there so few radioactive atoms found in nature?