Periodic Properties

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# Periodic Properties - PowerPoint PPT Presentation

Periodic Properties. Unit 5. Pre-Lab Write-Up. The following are due before you can do the lab: Title Purpose (be specific) Materials (optional) Procedure (be specific) Data Table(s). Post-Lab Write-Up. The following will be completed once you have completed the lab:

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## PowerPoint Slideshow about 'Periodic Properties' - havily

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### Periodic Properties

Unit 5

Pre-Lab Write-Up
• The following are due before you can do the lab:
• Title
• Purpose (be specific)
• Materials (optional)
• Procedure (be specific)
• Data Table(s)
Post-Lab Write-Up
• The following will be completed once you have completed the lab:
• Data Analysis/Calculations
• Graph
• Conclusion
Data Analysis/Calculations
• 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

Graph
• 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
Conclusion
• 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?