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Lab 5 Electron Configuration CHEM101L
Student Name: Elfreda Geebah Access Code (located on the lid of your lab kit):
Pre-Lab Questions
1. What is electron configuration?
2. How is the light emitted by an atom related to its electron configuration?
Data
Table 1: Results of firework material ignition
Substance
Observations
Lithium Chloride
Orange
Sodium Chloride
Dark Orange flame
Potassium Chloride
Dark Orange flame
Calcium Chloride
Flame
Post-Lab Questions
1. Write out the electron configurations for each of the following elements. Potassium is already done as an example for you. HINT: The periodic table is very helpful and can be used as a guide.
Element
Electron Configuration
K
1s22s22p63s23p64s1
Li
1S22S1
Na
1S22S22P63S1
Ca
1S22S22P63S23P64S2
2. What is the approximate wavelength of light emitted by each of the salts?
Salt
Color
Wavelength
LiCl
Dark red 600-665
NaCl
Light orange 610-630
KCl
Lilac 400
CaCl2
Orange 630
3. Why does a salt compound give off light or a colored flame when burned?
4. Did sodium chloride and potassium chloride give off similar colors? Why or why not?
Yes. Due to the same color they have therefore they make up of the same wavelength range.
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