Name__________________________________________________________ Date ______________ Period________
Atom Model Mastery
Chemistry; Coleman
Wherever you see a teacher approval box, you must get a stamp to receive credit.
Part One: The Models
Democritus (460-370 B.C.)
1. How would Democritus answer the question, “what is an atom?”
2. Using the provided clay, model an atom as Democritus described.
Teacher
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John Dalton (1766-1844)
1. How would Dalton answer the question, “what is an atom?”
2. Di d Dalton think all atoms are the same? Explain.
Using the provided clay, model this part of Dalton’s Theory.
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3. According to Dalton, what happens to atoms in a chemical reaction?
Using the provided Clay, model the reaction between two Hydrogen (H2)
Molecules and one oxygen (O2) to produce water molecules (H2O)
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J.J. Thomson (1856-1940)
1. What is the name of JJ Thomson’s model? Why did it have that name?
2. How would Thomson have described an atom?
3. Using the provided clay, model Thomson’s atom.
Teacher
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4. How is Thomson’s model of an atom different from what Democritus and Dalton thought an atom was
like?
Ernest Rutherford (1871-1937)
1. What is the name of Rutherford’s model?
2. How would Rutherford have answered the question, “what is an atom?”
3. Using the provided clay, model Rutherford’s atom.
Teacher
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4. How is Rutherford’s model of the atom different from Thomson’s model?
Niels Bohr (1885-1962)
1. What is the name of Bohr’s model?
2. How would Bohr have answered the question, “what is an atom?”
3. Using the provided clay, model a helium atom as Bohr would have.
Teacher
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4. What makes Bohr’s model different from Rutherford’s model?
Schrodinger and Heisenberg
1. What is the name of Heisenberg and Schrodinger’s atom model?
2. How would they have answered the questions, “what is an atom?”
3. Draw a picture of what a hydrogen atom might look like according to what Heisenberg and Schrodinger:
4. What makes Heisenberg and Schrodinger’s model different than Bohr’s model?