Chemistry
Standard I, Objective 3
Title: Periodic Table Model
Description: Students will use “element” cards to organize into a periodic table, using the symbols on the card.
Time Needed: 70-90 minutes
Materials:
Element cards (see this webpage)
Student sheet (see below)
Procedures:
- Read the introduction and directions with students.
- Assign or allow students to form small groups.
- Provide time for them to work.
- Ask students to display or explain their final product.
Scoring Guide:
Part I: Color, Top Number, Bottom Number, Circular Cutouts, Star Cutouts, Notches
Part II: Color, Top Number, Bottom Number
Circular Cutouts, Star Cutouts, Notches
Part III:
Color – Organized in the order of a rainbow (ROYGBIV).
Part IV:
Property 1: Green Color
Property 2: Number 8
Property 3: Number 14.7
Property 4: One Circular Cutout
Property 5: No Star Cutout
Property 6: One Notch
Part V: Summary
Once the elements are organized in the right way,
it becomes easy to see patterns.
- In this analogy, what did it mean for cards to be in the same family on the table?
Cards in the same family had similar types and numbers of cutouts. Once organized into families the unifying property of the table as well as patterns amongst the other properties emerged.
- Describe the pattern for the top number as you go down a column and across a row.
Across: +2, +3, +4, +5, +6 or x = p + pr + pc Down: +1, +2, +3 or y = p + (pr-1) + pc
+3, +4, +5, +6, +7 +2, +3, +4
+4, +5, +6, +7, +8 +3, +4, +5
+5, +6, +7, +8, +9 +4, +5, +6
+5, +6, +7
+6, +7, +8
- Describe the pattern for the bottom number as you go down a column and across a row.
Across: -4.6, -1.3, +1.9, +5.1, +8.3Down: +4, +5.2, +6.4
Name:
Date:
Periodic Table Analogy
Introduction
In 1869, Dmitri Mendeleev developed a periodic table of the known elements. Mendeleev was able to use his periodic table to predict the characteristic properties of undiscovered elements. In this experiment, you will develop a periodic table and use your table to predict the properties of a missing “element.”
Your instructor has given you 23 of the 24 rectangular pieces (“elements”) contained in this kit. Each piece (element) has six properties. Your goal is to develop a periodic table such that there is a pattern to each property. From the patterns discovered you can predict the location and properties of the missing piece.
Part I:What properties can you find?
Examine the pieces carefully and list the general properties you find on each card in the spaces provided below. You should find six.
1.______
2.______
3.______
4.______
5.______
6.______
Part II: Which properties do all elements have in common?
As you have learned, Mendeleev used atomic weight to place the elements in a continuous row. He noticed that some properties recurred with every eighth element. So then he moved the elements into rows of eight so that similar properties fell into columns. Which three properties listed above could be used to place the “element” pieces in a continuous row (which three properties are characteristic of all of the pieces)?
1.______
2.______
3.______
Part III: Try to Find the Patterns
Now, try placing the pieces in order by using the three properties listed above (part II). Then look carefully for patterns in the remaining properties. If you do find that some properties recur along the row at regular intervals, organize the pieces into a chart so that the properties fall into rows and columns. When you have found the best chart, list the pattern for each property in the space provided.
Property 1______
Property 2______
Property 3______
Property 4______
Property 5______
Property 6______
Part IV: What is the Missing Piece?
One piece (element) is missing from your kit. From your arrangement in your chart, try to predict the properties of the missing piece. List the properties of the missing piece below. Draw a picture of the missing piece on the template provided.
Property 1 ______
Property 2______
Property 3______
Property 4______
Property 5______
Property 6______
Permission is hereby granted to reproduce this form for classroom use with the Periodic Table Analogy Kit.