Download Atomic Theory WS

CP Chem
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Ch 3 Atomic Theory WS
Pd:
Section 1
1. What Greek philosopher first proposed the existence of the atom?
2. The Greek word for atom means what?
3. Why didn’t anyone believe him?
4. What does the Law of Conservation of Mass state?
5. What is the Law of Multiple Proportions?
6. Write Dalton’s Atomic Theory:
7. Is his theory true today?
Section 2
8. Describe Dalton’s Atomic Model:
9. Is the electron a subatomic particle?
10. What kind of rays were studied to find the electrons?
11. What experiment did Robert Millikan perform?
12. How heavy is an electron compared to a hydrogen atom?
13. What kind of rays did Millikan use in his experiment?
14. Thomson proposed a funny kind of atomic model. What was it called?
15. Ernest Rutherford, with the help of Geiger and Marsden, did what famous
experiment? Explain what they did.
16. What did the discover about the atom?
17. How is Rutherford’s Atomic Model different from Thomson’s Model?
18. List the 3 subatomic particles, their symbols and the rest of the information
found in a table in the PowerPoint.