Name___________________________________________
Date_________________
Period______
Electron Configuration Practice Worksheet
In the space below, write the ground-state electron configurations of the following
elements:
(1 point each)
1. sodium ____________________________________________________________
2. magnesium _________________________________________________________
3. iron _______________________________________________________________
4. potassium __________________________________________________________
5. selenium ___________________________________________________________
In the space below, use noble gas notation to write the ground-state electron
configurations of the following elements:
(1 point each)
6. cobalt _____________________________________________________________
7. silver ______________________________________________________________
8. tellurium ___________________________________________________________
9. radium ____________________________________________________________
10. lawrencium ________________________________________________________
Determine what elements are denoted by the following electron configurations: :
(1 point each)
11. 1s22s22p63s23p4 ____________________________________________________
12. 1s22s22p63s23p64s23d104p65s1 ______________________________________
13. [Kr] 5s24d105p3 ___________________________________________________
14. [Xe] 6s24f145d6 ___________________________________________________
15. [Rn] 7s25f11 ______________________________________________________
1
Name___________________________________________
Date_________________
Period______
Explain what is wrong with the following electron configurations, and then write
the electron configuration correctly:
(1 point each)
16. 1s22s22p63s23p64s24d104p6
__________________________________________________________________________
__________________________________________________________________________
17. 1s22s22p63s33d5
__________________________________________________________________________
__________________________________________________________________________
Use the following electron configurations and your periodic table to identify the
element: (1 point each)
18. 1s2 2s2 2p6 3s2 3p5 ______________________________________________________
19. 1s2 2s2 2p6 3s2 3p6 4s2 ___________________________________________________
20. 1s2 2s2 2p6 3s2 3p6 4s2 3d104p1____________________________________________
21. Describe the method that you used to solve problems 18-20. Be specific.
(3 points)
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
__________________________________________________________________________
2
Name___________________________________________
Date_________________
Period______
Use the following clues to identify the element.
(1 point each)
22. This element has a 3p sublevel that contains 3 electrons.
__________________________________________________________________
23. This element has a 4s sublevel with 2 electrons for its outermost electrons.
__________________________________________________________________
24. This element has 1 electron in its 3d sublevel.
__________________________________________________________________
25. This element has 5 electrons in its 5p sublevel
__________________________________________________________________
27. This element has a completely filled 3p sublevel for its outermost electrons.
__________________________________________________________________
Grading scale: 30 points possible
A: 27-30
B: 24-26
C: 21-23
D: 18-20
F: <18
Page 1__________
Page 2__________
Page 3__________
Total points____________________ Letter grade____________________
3