Name : ______________________________________
Periodic Table Graphing Lab
Purpose: Determine how density, radius, ionization energy, and electronegativity changes on the table.
Materials: graduated cylinder, balance, weighing dished, lead, silicon, tin, reference tables, graph paper, rulers.
Pre-Lab:
1. Explain how you plan to find the density of silicon, tin, and lead.
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2. Where can you find the actual densities of silicon, tin, and lead? List them here:
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Procedure:
1. Find the density of the tin, lead and silicon. Be sure to record all measurements and show all work.
Silicon
Tin
Lead
2. Graph density versus atomic number for the three substances you measured.
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3.
Calculate the percent error of your densities using table S.
Silicon
Tin
Lead
4. On your graph, estimate the density of carbon and germanium. Place marks on the graph and label with
symbol and estimated density. Then calculate you percent error.
Carbon
Germanium
5. Using your reference table S, graph the following:
*Be sure to label the axis and name of the graph! Use appropriate scales. Atomic Number should
always be labeled on the x axis.
a. Atomic Number versus Radius for the Halogens.
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b. Atomic Number versus Radius for Period 2.
c. Atomic Number versus Ionization Energy for the Alkali Metals.
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d. Atomic Number versus Ionization Energy for Period 3.
e. Atomic Number versus Electronegativity for the Alkaline Earth Metals
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f. Atomic Number versus Electronegativity for Period 2.
6. Fill in the blank with increase or decrease based on your graphs:
a.
Along a period, atomic radius __________________
b.
Along a group, atomic radius __________________.
c.
Along a period, ionization energy __________________.
d.
Along a group, ionization energy__________________.
e.
Along a period, electronegativity __________________.
f.
Along a group, electronegativity __________________.
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