The students will be able to:
Create a macroscopic (3D) model of several properties of the periodic table.
Explain in their own words the following terms: atomic radii, ionic radii, first ionization energy, and electronegativity.
Identify, describe, and explain the patterns observed in the 3-D periodic table for the following element properties: atomic radii, ionic radii, first ionization energy, and electronegativity.
The classroom will be divided into 8 groups. A property (out of 4 different properties) will be assigned to two groups, so each pair of groups will focus on one property. The students will define whichever property they got assigned to—atomic radii, ionic radii, first ionization energy, and electronegativity. Once they have a definition, they will use a ration formula or a ratio calculator that will convert the magnitude of each property into a
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What patterns do you observe in each of the 4 3-dimensional models?
2. What happens to the _(property 1 of 4)_ as you move right, up, or down from hydrogen?
3. Neon has an electronegativity of zero, however, what would you have predicted its electronegativity to be based on the pattern portrayed by your model?
4. What is an appropriate ionic radius for a couple of the missing elements in your table?
5. Are there any inconsistencies in the periodic table? Is there anything odd or that stick out of the normal pattern? If so, explain what you see.
6. Why is this investigation with straws important?
7. Why are scientists interested about patterns, and how does this relate to the modern organization of the periodic table (think back to section 6.1 in chapter 6)?
Translation will be provided to the student with Limited English Proficiency.
The student with an IEP will help measure and cut out straws. He will be assisted by his group members in the task. Moreover, he will be required to analyze the patterns in his 3-D models. I will check for understanding by asking him specific questions about the