Periodic Table Assignment
The periodic table (PT) is a tool for chemist. The information on the PT extends beyond the information provided for
each element. The location of the element on the table provides chemist with a great deal of information. The purpose
of this assignment is to become more familiar with the PT and the information you find. For every evaluation (test,
quizzes, exams…) you will be provided with a PT similar to one in your textbook.
What you need:
1. Computer with internet access.
2. Worksheet “Colouring the Periodic Table”.
3. Pencil crayons.
Instructions:
1. Go to ptable.com. There is an interactive PT at this site that is full of information.
2. Click on Wikipedia.
3. Task One: Element Groupings. On the “Colouring PT Worksheet”, colour Periodic Table #1using different colours
to represent the groups elements belong to. (alkali metals, alkaline earth metals….)
4. Task Two: Metals vs Nonmetals On the “Colouring PT Worksheet”, colour Periodic Table #2 to represent the
elements as metals, nonmetals and metalloids
5. Task Three: State at Room Temperature: On the “Colouring PT Worksheet”, colour Periodic Table #3 to
represent the state of the element at room temperature. (It is important that you check the temperature is set
properly. You will see a slide bar at the top of the PT which goes from blue to red. Beside this slide bar is a box –
be sure the box contains the number 298. This is 25oC. The temperature scale being used on this website is the
Kelvin Scale – we will learn about this temperature scale in the gases unit.)
6. Task Four: Naturally Occurring Elements: On the “Colouring PT Worksheet”, colour Periodic Table #4 to
represent the Naturally Occurring Elements versus the Synthesized Elements. Best to use the PT located in rm
155.
7. Task Five: Trends in the Periodic Table: You are going to investigate there different trends on the PT.
a. Using the your textbook and/or the internet write a definition of each of the following: (be sure you
understand these definitions)
i. Atomic Radius
ii. First Ionization Energy
iii. Electronegativity
iv. Isotopes
v. Average atomic mass (average atomic weight)
b. Go to ptable.com and click on properties. Click on the circle beside Calculated Radius. The radius of the
atom of an element will appear in the bottom of each element box. The measurement is in pm.
c. Open excel. You need to put together a data table with the following headings.
Name
Name
Hydrogen
Helium
Symbol
Atomic #
Caculated Radius (pm)
1st Ionization Energy (kJ/mol)
Electronegativity
st
d. Using ptable.com fill in the data for the first 40 elements only. Do the same for 1 Ionization Energy and
Electronegativity. Save to Mydocs. Print off a copy.
Symbol
H
He
Atomic #
1
2
Caculated Radius (pm)
53
31
1st Ionization Energy (kJ/mol)
1312
2372.3
Electronegativity
2.2
e. Using the graphing tools graph the following on three different graphs:
i. Atomic Radius vs Atomic Number
ii. First Ionization Energy vs Atomic Number
iii. Electronegativity vs Atomic Number
Atomic number will be the independent variable (put on x-axis) on each graph. Graph as a scatter graph with
straight lines and markers. Label the axis (with units) and provide a title. Try to increase the number of gridlines
in the graph. Transfer each graph into a word document and stretch graphs to fill a single page each – best to
change the page orientation to landscape. Save to Mydocs.
f. Show your graphs to the teacher before you print them off.
g. On each graph, using a pencil, write the symbol for the element represented at each point.
h. Analysis the graphs as you answer the following questions.
Part One: Atomic Radius
Using your Atomic Radius vs Atomic Number graph:
1. What is the group name for the elements found at the peaks of your graph? Where is this group located on the
periodic table?
2. What is the group name for the elements found at the troughs of your graph? Where is this group located on
the periodic table?
3. a) What is the trend in the size of atomic radii as the atomic number increases within a group?
b) Explain this trend.
4. a) What is the trend in the atomic radii as the atomic number increases across a period?
b) Explain this trend.
Part Two: First Ionization Energy
5. a) What is the trend in the first ionization energies as the atomic number increases within a group of elements?
b) Explain this trend.
6. a) What is the trend in the first ionization energies as the atomic number increases across a period or row of
elements?
b) Explain this trend.
Part Three: Electronegativity
7. What is the trend in electronegativity as the atomic number increases within a group of elements?
8. What is the trend in electronegativity as the atomic number increases across a periods or row of elements?
Task 6: Average Atomic Mass and Isotopes
1. Go to ptable.com. Click on Isotopes. Click on hydrogen. Three isotopes of hydrogen will appear:
Hydrogen-1, hydgrogen-2 and hydrogen-3. What do the 1,2 and 3 represent?
2. Click on hydrogen 1and fill in the following chart below. Repeat with hydrogen-2 and hydrogen-3.
Isotope
Name
Number of
Number of
Isotope Mass (u)
Natural
Protons
Neutrons
Abundance (%)
3. Repeat steps 1 and 2 using magnesium.
Isotope
Name
Number of
Protons
Number of
Neutrons
Isotope Mass (u)
Natural
Abundance (%)
4. Click on Wikipedia. Be sure the box in front of Weight is checked off. What atomic weight is listed below
magnesium? How is this mass obtained?
5. When you are finished the above assignment, feel free to see what else this interactive periodic table has to
offer.
To Hand In
 Tasks 1-4: Colouring the Periodic Table Worksheet
 Task 5:
o Definitions
o Data Table
o Three Graphs (Atomic Radii, First Ionization Energy and Electronegativity vs Atomic Number)
o Answers to questions 1-8. (full sentences, imply answer in question – these may be done on the
computer or hand written)
 Task 6:
o Answer to Question 1
o Two data tables.
o Answer to question 4.