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What color does lithium chloride burn

18/11/2021 Client: muhammad11 Deadline: 2 Day

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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