Name: 
 

Chemistry -- Electron Shells


Completion

Complete each sentence or statement.


NOTE: You will need to use the Periodic Table chart in the back of your chemistry book to look up
each element and figure out the number of electrons.. 


HINT: The TOP number in each element rectangle is called the “Atomic Number” and represents how
many electrons and protons the element has.)

 
 
Electron Shell Configurations (for elements with atomic numbers 1-20)
1st shell

(2 max)

2nd shell

(8 max)

3rd shell (18 max) but ... no more than 8 in outer shell
4th shell (32 max) but ... no more than 8 in outer shell
1
2-1
2-8-1
2-8-8-1
2
2-2
2-8-2
2-8-8-2
 
2-3
2-8-3
 
 
2-4
2-8-4
 
 
2-5
2-8-5
 
 
2-6
2-8-6
 
 
2-7
2-8-7
 
 
2-8
2-8-8
 
 

 1. 
Give the electron shell configuration for Carbon.
 

 

 2. 
Give the electron shell configuration for Fluorine.
 

 

 3. 
Give the electron shell configuration for Boron.
 

 

 4. 
Give the electron shell configuration for Sulfur.
 

 

 5. 
Give the electron shell configuration for Argon.
 

 

 6. 
Give the electron shell configuration for Calcium.
 

 

 7. 
Give the electron shell configuration for Silicon.
 

 

 8. 
Give the electron shell configuration for Aluminum.
 

 

 9. 
Give the electron shell configuration for Chlorine.
 

 

 10. 
Give the electron shell configuration for Helium.
 

 

 11. 
Give the electron shell configuration for Neon.
 

 



 
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