Download trend lab

Name:
Partner:
Block
The Periodic Table
Background: The present organization of the elements is a product of the table Mendeleev created in 1869. The Periodic Law states
that the chemical and physical properties of the elements are periodic functions of their atomic numbers. Each of the elements
known today has its own set of characteristic properties. These range from the state of matter, color, conductivity, density, size, and
a variety of other properties. The elements are arranged within the periodic table into groups (vertical columns) or families and
horizontal periods. This arrangement reflects the repeating nature of the properties of the elements.
Purpose: You will arrange the code elements in groups 1&2 (s block) and 13-18 ( the p block) (the entire d and f block is
not present )according to atomic number, symbol, oxidation number, atomic radii, and electronegativity.
Materials: Scissors, glue, tables
Procedure:
1. Cut out all the blocks of the mystery elements arrange them into their vertical groups listed below.
2. Following the clues to place them onto the table. Using your knowledge of periodic trends re-orangized the
elements within each group according to atomic radii and electronegativity. Place unlettered code boxes in
according to oxidation number or size.
3. Glue them into the position you believe they are and identify them.
4. Fill in the atomic number, symbol, and oxidation state for all the mystery elements.
THE CLUES:
1. The following elements are in the same group. Once in the group do not split them up!
LKD, SNE, AWIXT, YMB, QCF, POH, RJV, ZGU
2. I is an alkali metal
3. M has 8 valence electrons
4. H is a halogen
5. P is the only liquid
6. N is an alkaline metal
7. S ions build strong bones and teeth it will lose 2 electrons to become stable
8. R is used as a poison
9. D is a metal that will melt in your hand!
10. R us a metalloid
11. U has six protons
12. O is a gas
13. Q has six valence electrons
14. E is the least reactive in its group
15. I is more reactive than S
16. X has the smallest atomic mass
17. C has 8 electrons
18. N was used in flash bulbs because it burns with a bright white light
19. BIRQPZDS ARE ALL IN THE SAME PERIOD
20. C is used in respiration of animals
21. K is used in soda cans
22. H is the most reactive non-metal
Lab Analysis:
Define the following terms and looking at your table describe the following trends you observe and explain why each
trend is occurring
1. Atomic Radii-
Down a group
Across a period left to right
2. Electronegativity
Down a Group
Across a Period
3.
Oxidation Number
How is the electron configuration related to the oxidation number of a group?
Post Lab Questions:
1.
Explain how the size of a metal influences the reactivity of the metal?
2. Explain how the size of a halogen influences the reactivity of the halogen?
3. What is the oxidation number for the noble gases? Explain.
4. How could you use your table to predict the atomic radii for the element Iodine? What would you predict it to be?
5. How could you use your table to predict the value for electronegativity for carbon? What would you predict it to be?