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Periodic Properties

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Periodic Properties

Unit 5

- The following are due before you can do the lab:
- Title
- Purpose (be specific)
- Materials (optional)
- Procedure (be specific)
- Data Table(s)

- The following will be completed once you have completed the lab:
- Data Analysis/Calculations
- Graph
- Conclusion

- Show calculation for the density of each element, include proper unit, and watch for sig. figs.
- Density = mass (g) / ∆volume (mL)

- Calculate the percent error of the density of Ge and C. (this will be done after making the graph).

Exp - Act

Act

% Error =

x 100

Act. Density of C = 1.4 g/mL

Act. Density of Ge = 5.3 g/mL

- Construct a graph of density vs. atomic number (plot density on the y-axis and atomic number on the x-axis; both axes MUST start at zero.)
- Draw a best fit line through your data
- Use the graph to interpolate the density of Ge and extrapolate the density of C
- Include appropriate markings on the graph for the unknown densities
- Follow all graphing techniques discussed in class

- In your conclusion you should examine the results of your lab.
- What values did you determine for the densities of Ge and C to be?
- How were you able to determine the densities of these two elements? (EXPLAIN)
- Were the results close to what they were supposed to be (examine your percent error)?
- Why did you have error in your lab; what could you/would you do differently next time?