CHEM-1BL Grading Rubric
Student Name:________________________________
Report 7 - Experiment 14: Atomic Spectroscopy
Lab Partner: _______________________________
Pre-Lab: (2 pts)
TA: ________________________________
Name, Date, Title, Introduction (1 pt)
Pre-Lab Questions (1 pt)
Data: (2.5 pts)
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Original data from your lab notebook must be included in your lab report
Part 1: Table of data: Record spectrocsope scale readings for the given wavelengths of the mercury
emission lines. (1 pt)
Part 2: Table of data: Record spectrocsope scale readings for the hydrogen atom emission lines in
the visible region. Record the spectroscope scale reading for violet, blue, green and red lines. (1 pt)
Part 3: Table of Data: Record flame color for each of the metals. (0.5 pt)
The colors of spectroscope lines of each of the metals in the flame (if you were able to)
Calculations: (2.5 pts)
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Part 1: Calibration Graph: Plot the wavelengths given for the mercury emission lines on the x-axis
and the corresponding spectroscope scale readings on the y-axis. Draw a line through the
points or do a linear least square fit of the data with Excel. (1 pt)
Part 2: Determine the observed wavelength for each of the hydrogen atom emission lines using the
calibration graph from Part 1. (0.5 pt)
Table of Results: Record the observed wavelengths for hydrogen line spectrum; the corresponding
accepted wavelengths; the change in energy calculated for each of the electronic transitions
observed for the hydrogen line spectrum; and the Initial and final states for each of the transitions
(nintial → nfinal). (1 pt)
Discussion: (10 pts)

Checklist (5 pts max for including the items listed below in your report)
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Explain what the experiment was about (one or two sentences) (0.25 pt)
Part 1: Give the purpose and general method (0.5 pt)
Discuss the mercury emission line spectrum and the calibration graph. (0.75 pt)
Part 2: Give the purpose and general method (0.5 pt)
Discuss the lines observed for hydrogen atom emission spectrum (0.5 pt).
Compare and discuss the observed wavelengths of the hydrogen atom emission lines to the
accepted wavelengths. (0.5 pt)
Compare and discuss the electronic transitions (nintial → nfinal) determined with the known
transitions for the hydrogen atom emission spectrum in the visible region, called the Balmer
series (do a search for Balmer series using Google or Wikipedia). (0.5 pt)
Part 3: Give the purpose and general method (0.5 pt)
Discuss the flame colors and the spectroscope lines of each of the metal salts. (0.5 pt)
Discuss Sources of Error in a paragraph at the end of your discussion. Discuss possible errors in
the calibration graph and in determining the wavelengths for each of the hydrogen atom
emission lines. (0.5 pt)
 “Quality points” (5 pts max; “average” report gets 2.5 pts)
How clear/cohesive/insightful the discussion is, relative to others in the class
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Review Questions: (3 pts)
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5 questions, 0.6 pts each
Clearly show your calculations and put a box around each answer.
Neatness:
Every page present, Name/Date/Exp.# each page; Writing must be legible
No scribbles, no whiteout - draw a single line through mistakes
Sections Organized/Labeled; Final answer for each question is boxed
Staple this page to your lab report.
TOTAL: (20 pts)
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