Download Graphing Periodic Trends

Graphing Periodic Trends
Introduction: Elements on the periodic table are arranged in such a way that they exhibit patterns in their
properties. In this activity, you will graph their properties and analyze their patterns. You will determine the
Periodic Trends for the following properties: atomic radius, electronegativity, and ionization energy.
Definitions:
1.
Electronegativity- ability of an atom to attract bonding electrons to itself
2.
Atomic radius- measure of the size of an atom
3.
Ionization energy- energy needed to remove an electron from an atom
DIRECTIONS:
When you are finished you will have 3 Excel Documents and 1 MS Word Document.
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MS word doc will have 3 sections. Save to your folder as last name, Answers Graphs PT trends. Save as
you go.
Section #1: Electronegativity Graph and answers to electronegativity questions in complete sentences.
Section #2: Atomic Radii Graph and answers to the atomic radii questions.
Section#3: Ionization Energy Graph and answers to the ionization energy questions. SAVE on your flash
drive and PRINT at home when completed.
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Make one Excel Document with all your Atomic Numbers filled in then make 3 copies of that document
1. Open an excel spreadsheet.
2. In column A, going down, type the numbers 1-20, 31-38, and 49-54. There are 34 numbers in total and these
represent the atomic number of the elements from the periodic table.
3. Close the Excel document you just made and make 2 more copies for a total of 3 Excel Documents
Name the Excel Documents as follows:
Last Name PT Trends Electronegativity
Last Name PT Trends Atomic Radius
Last Name PT Trends Ionization Energy
Ex. Johnson PT Trends Electronegativity
Graph #1: Electronegativity vs Atomic Number
1. Open an your excel spreadsheet for Electronegativity.
2. Column A, going down, should have the numbers 1-20, 31-38, and 49-54. There are 34 numbers in total
and these represent the atomic number of the elements from the periodic table.
3. In column B, going down, type the electronegativity values for the elements with the atomic numbers
you listed in column A. You will find these values on the appropriate periodic table attached.
4. Highlight all of the data in columns A and B.
5. Click on insert (top tab – not right click).
6. Click on the scatter tab at the top.
7. Look at the scatter options and choose with straight lines and markers.
8. Under chart tools at the top click on layout.
9. Click on chart title and put your graph title.
10. Click on Axis title and put in labels/units for each axis.
11. Click on copy at the top left.
12. Paste the graph into your word document.
13. Under the graph answer the questions below in complete sentences.
Electronegativity Analysis Questions (answer in complete sentences) Answer in MS Word Document
1. Examine your graph. Find the atomic numbers 3-9 that correspond with the elements in period 2. IN
GENERAL what happens to electronegativity values as you move across a period (increase or
decrease)?
2. Examine your graph. Find the atomic numbers 11-17 that correspond with the elements in period 3. IN
GENERAL what happens to electronegativity values as you move across a period (increase or
decrease)?
3. Examine your graph. Find the atomic numbers 1, 3, and 11 that correspond with elements in group 1.
IN GENERAL what happens to electronegativity values as you move down the group (increase or
decrease)?
4. Summary of the trend for electronegativity: Electronegativity ________________ across a period and
________________ down a group.
Graph #2: Atomic Radii vs Atomic Number
1. Open excel spreadsheet titled Atomic radius
2. Column A, going down, should have the numbers 1-20, 31-38, and 49-54. There are 34 numbers in total
and these represent the atomic number of the elements from the periodic table.
3. In column B, going down, type the atomic radii values for the elements with the atomic numbers you
listed in column A. You will find these values on the appropriate periodic table attached.
4. Highlight all of the data in columns A and B.
5. Click on insert (top tab – not right click).
6. Click on the scatter tab at the top.
7. Look at the scatter options and choose with straight lines and markers.
8. Under chart tools at the top click on layout.
9. Click on chart title and put your graph title.
10. Click on Axis title and put in labels/units for each axis.
11. Click on copy at the top left.
12. Paste the graph into your word document.
13. Under the graph answer the questions below in complete sentences.
Atomic Radius Analysis Questions (answer in complete sentences)
1. Examine your graph. Find the atomic numbers 3-9 that correspond with the elements in period 2. IN
GENERAL what happens to atomic radius values as you move across a period (increase or decrease)?
2. Examine your graph. Find the atomic numbers 11-17 that correspond with the elements in period 3. IN
GENERAL what happens to atomic radius values as you move across a period (increase or decrease)?
3. Examine your graph. Find the atomic numbers 1, 3, and 11 that correspond with elements in group 1.
IN GENERAL what happens to atomic radius values as you move down the group (increase or
decrease)?
4. Summary of the trend for atomic radius: Atomic radius ________________ across a period and
________________ down a group.
Graph #3: Ionization Energy vs Atomic Number
1. Open an excel spreadsheet.
2. In column A, going down, type the numbers 1-20, 31-38, and 49-54. There are 34 numbers in total and
these represent the atomic number of the elements from the periodic table.
3. In column B, going down, type the ionization energy values for the elements with the atomic numbers
you listed in column A. You will find these values on the appropriate periodic table attached.
4. Highlight all of the data in columns A and B.
5. Click on insert (top tab – not right click).
6. Click on the scatter tab at the top.
7. Look at the scatter options and choose with straight lines and markers.
8. Under chart tools at the top click on layout.
9. Click on chart title and put your graph title.
10. Click on Axis title and put in labels/units for each axis.
11. Click on copy at the top left.
12. Paste the graph into your word document.
13. Under the graph answer the questions below in complete sentences.
Ionization Energy Analysis Questions (answer in complete sentences)
1. Examine your graph. Find the atomic numbers 3-9 that correspond with the elements in period 2. IN
GENERAL what happens to Ionization Energy values as you move across a period (increase or
decrease)?
2. Examine your graph. Find the atomic numbers 11-17 that correspond with the elements in period 3. IN
GENERAL what happens to Ionization Energy values as you move across a period (increase or
decrease)?
3. Examine your graph. Find the atomic numbers 1, 3, and 11 that correspond with elements in group 1.
IN GENERAL what happens to Ionization Energy values as you move down the group (increase or
decrease)?
4. Summary of the trend for Ionization Energy: Ionization Energy ________________ across a period and
________________ down a group.