CHEMISTRY LAB

Viewing Density as a Periodic Trend Names: _____________________________

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Purpose: How does density change as you move down a family on the periodic

table?

Materials:

Lead Shot 10-ml graduated cylinder

Tin Shot 50-ml graduated cylinder

Silicon pieces Balance

Carbon Weighing dishes

Procedure

1. Determine the mass and volume of each sample. Record in your data table.

2. Calculate the density of each sample.

3. Graph density vs. period number for your samples.

Data:

Element	Calculated Density
carbon
silicon
tin
lead

D E N S I T Y In G R A M S / cm^3
	Key □ carbon □ silicon □ tin □ lead

P E R I O D

Analysis and Conclusions

1. How does density change as you move down this group in the periodic table?

2. Use your graph to interpolate the density of germanium.

3. Calculate the percent error of your densities you determined as compared with accepted values.

1. Lead 11.342 g/cm³

2. tin 7.265 g/cm³

3. silicon 2.336 g/cm³

4. carbon 2.266 g/cm³

e. germanium 5.323 g/cm³

Extra Credit: Look up the densities for another family. Do you observe the same periodic trend as you found in this experiment? Turn in a written explanation.