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

/

cm3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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 

 

 

 

 

  1. tin                                7.265 g/cm3

 

 

 

 

  1. silicon                         2.336 g/cm3

 

 

 

 

  1. 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.

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