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Pre-laboratory Question Periodicity and the Period Table

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1. Give an example of a type of real-world item that is organized or sorted in a specific way. Organizational structure

2. How can items in the previous question be organized? Organizational structure is organized using a hierarchy.
3. Would you notice if one of the items went missing? Why or why not? In a structured organization, if you take out one position, it could be easily notice. This is because; you need to get to lower rank before you can get to the higher rank. For instance, you cannot report a co-worker to the manager without talking to your immediate supervisor first. You need to follow the chain of command.
4. How is the modern periodic table organized? The periodic table is organized in period (rows) and groups/families (columns). Elements in a particular group are grouped based on their physical and chemical properties. Metals are grouped on one side whereas non-metals on the other side. Metalloids are in the middle.
Discussion Questions Activity 1 1.
Are there other ways the cards could be organized? If so, what are they? Yes. Cards can be organized based on how they react with water, and other elements.
2. Use the picture taken in Step 8 to predict the appearance of the next column of colored cards.
3. How did your classmate organize his cards?
4. What patterns are associated with your classmate’s organizational scheme?
5. How did your predicted description of the missing cards compare with the actual missing card?
6. Are there any changes you would make to your organizational system? If so, what changes would you make?
Activity 2 1. Are there other ways the cards could be organized? If so, what are they?
2. Use the picture taken in Step 9 to predict the appearance of the next row of cards.
3. How did your classmate organize his cards?
4. What patterns are associated with your classmate’s organizational scheme? 5. How did you predict the properties of the missing elements? 6. How did your predicted description compare with the actual description? 7. Are there any changes you would make to your organizational system? If so, what changes would you make?
Activity 3 1. Why does the modern periodic table place helium in a family with neon instead of with beryllium? Atomic Mass
1. Why are the elements no longer organized by atomic mass?
2. What pattern is there with regard to valence electrons, oxygen bonding ratio and electron configuration?
3. Where in the periodic table are the elements with the largest atomic radii? Where are those with the smallest atomic radii?
4. How does atomic radius change from left to right across a period, or row, in the periodic table?
5. How does atomic radius change from top to bottom down a group, family or column in the periodic table?
6. Why does this trend exist in atomic radii?
7. How do the atomic radii of the following elements compare? Which is larger? a. Se and Br b. Rb and Cs c. Ca and As d. Sn and Pb Ionization Energy
8. Where in the periodic table are the elements with the greatest first ionization energies? Where are those with the smallest first ionization energies?
9. How does first ionization energy change from left to right across a period, or row, in the periodic table?
10. How does first ionization energy change from top to bottom down a group, family or column in the periodic table?
11. What is the relationship between the trend in ionization energy and the trend in atomic radius? Why does this relationship exist?
12. How does the first ionization energy of the following elements compare? Which is higher? a. Se and Br b. Cl and I c. Ca and As d. Sr and Rb Electronegativity
13. Where in the periodic table are the elements with the greatest electronegativity? Where are those with the least electronegativity?
14. How does electronegativity change from left to right across a period, or row, in the periodic table?
15. How does electronegativity change from top to bottom down a group, family or column in the periodic table?
16. How does the electronegativity of the following elements compare? Which is higher? a. Se and Br b. Cl and I c. Ca and As d. Sr and Rb
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