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October 17, 2014
Practice Extravaganza: Electron Configurations
PART A –ELECTRON CONFIGURATIONS: SUB-SHELL & BOHR*
Use the patterns within the periodic table to write longhand electron configurations and draw orbital diagrams
for the following atoms. *Try the Bohr if you like!
Symbol
1.
Zr
2.
Ni
3.
Cl
# e-
Longhand Electron Configuration
Bohr Configuration*
Use the patterns within the periodic table to write the shorthand electron configurations for the following
elements.
Symbol
4.
Po
5.
W
6.
Xe
7.
U
# e-
Shorthand Electron Configuration
Write Orbital Box Notation for the following elements. You may use condensed configurations.
Symbol # eOrbital Box Notation
8.
S
9.
V
10.
F
11.
Si
PART B – RULES OF ELECTRON CONFIGURATIONS
Which of the following “rules” is being violated in each electron configuration below? Explain your answer for
each. Hund’s Rule, Pauli Exclusion Principle, Aufbau Principle


 __ __
1s
2s
2p


  
___
 _ _
1s
2s
2p
3s
3p


  
1s
2s
2p


  
15. 1s
2s
2p
12.
13.
14.
   _
3s
3p
   
3s
    
3p
3d
PART C—Consider the electron configurations and answer the following questions.
Determine what elements are denoted by the following electron configurations:
16. 1s22s22p63s23p4 ____________________
17. 1s22s22p63s23p64s23d104p65s1 ____________________
18. [Kr] 5s24d105p3 ____________________
19. [Xe] 6s24f145d6 ____________________
20. [Rn] 7s25f11 ____________________
Determine which of the following electron configurations are not valid:
21. 1s22s22p63s23p64s24d104p5 ____________________
22. 1s22s22p63s33d5 ____________________
23. [Ra] 7s25f8 ____________________
24. [Kr] 5s24d105p5 ____________________
25. [Xe] ____________________