Created on: July 12, 2007

Website Address: https://library.curriki.org/oer/3-D-Periodicity-Directions-

TABLE OF CONTENTS

IN COLLECTION

A.
__Make the Outline of the PT (on a large sheet
of paper – ex. 11” x 17”)__

1. It is
suggested that you take a sheet of 11” x 17” (23 cm x 43.5 cm) poster board and
make a grid of 2 cm x 2 cm squares (suggested in pencil)

2. Outline
the periodic table in your grid (H should be about 3 squares from the top and
left corner of the paper)

3. Label all
of the elements in your periodic table

B.
__Determine the Scale of the Element Bars__

1. You will
be given a Periodic Property (boiling point, melting point, density, atomic
radius, first ionization potential, electronegativity, thermal
conductivity). The values for these
properties can be found on the periodic table I gave you.

2. Make a
table of the elements (in order of atomic number,) and put the value of the
property in a column next to the element (eg. for density H – 0.0899 g/cm^{3})

3. Scan the
list and find your maximum value – this will be your highest bar. We want the
highest bar to be 10 cm so divide your maximum value by 10 cm to get the value
of your scale (what each cm will be worth) (**REMEMBER**!). (eg. for density the max is Os – 22.6 g/cm^{3},
divided by 10 cm = 2.26 (g/cm^{3}) / cm)

4. Then use your scale to determine the height
of the bar for each element and write it in a third column in table you made in
step 2 (with units) (eg. H – 0.0899 g/cm^{3}, divided by divided by
2.26 (g/cm^{3})/cm gives you a bar height rounded to the nearest tenth
of 0.0 cm. Os – 22.6 g/cm^{3}, divided by 2.26 (g/cm^{3})/cm
gives a bar height rounded to 10.0 cm)

Density (scale = 2.26 (g/cm |
||

Element |
Density
(in g/cm |
Bar Height
(in cm) |

H |
0.0899 |
0.0 |

Os |
22.6 |
10.0 |

**
II. ****Creating your Property Bars**

A and B
Using the Bar Height for each element, create your 3-D bars.

1. Create strips of paper 2 cm wide. (suggestion – measure one 2 cm strip and then fold paper like an accordion or fan, and then cut along the folds to make several 2 cm strips)

2. Use the strips and the Directions for Making a 3-D Bar for each element.

3. On top of each bar label the with the element symbol and the value of the periodic property (eg. H and 0.0899) (be as artistic or creative as you want with this step)

4. Attach the bars to the table by their
feet.

**
III. ****Finalizing your Table Graph**

A. and B. 1. Give the Board a Title (eg. Periodic
Trends – Density).

2. Add some color, or artistic flare to
make it attractive.

3. Put your name on the lower right corner