Atomic Theory/ Model Time Line - Bellefonte Area School ...
Chemistry
Mr. Harper
Atomic Theory Timeline
Purpose: By completing this activity, students will learn how the understanding of the atom progressed
throughout history and how scientific models change with the introduction of new evidence.
Requirements:
1) Create a timeline of atomic theory.
***It must be an actual, physical timeline, not just an outline listing the events.
2) Include the following scientists:
Bohr Chadwick Dalton
de Broglie Democritus Goldstein
Rutherford Schrodinger Thomson
3) Include the following information for each scientist:
• Date – What was the time or year of the scientist’s work concerning the atom? (1 pt)
• Observations/Experiments/Evidence – Describe or explain what observation, evidence, or experiment the scientist used to devise his theory of the atom. (2 pts)
• Discoveries/Conclusions – Explain what discovery or conclusion the scientist came to about the atom. What was his atomic theory? (2 pts)
• Contribution – Explain how the scientist helped in the development of atomic theory. How did his work contribute to the theory? What did his experiment/discovery/conclusion do for the theory? Think about the larger picture and how the theory progressed as a result of his work. (2 pts)
4) Bonus: Draw a diagram of the scientist’s model of the atom for Democritus, Dalton, Thomson, Rutherford, Bohr, and Schrodinger. (Up to 6 pts)
5) You may use your textbook (pp. 43, 67-76, and 97-106), the library, the internet, or other credible sources to research the information needed to complete the timeline.
***You must document your sources and include them on the project.
6) You may work alone or in groups of two.
Grading:
7 pts for each scientist
12 pts for the physical timeline
75 points total for the project
Due Date:
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