1. Chapter 7: Atomic Structure & Periodicity
Orbital Filling Rules Worksheet

2. Orbital Filling Rules Worksheet
Element Incorrect Configuration
Al 1s2 2s2 2p6 3p3
Rule Violation Correct Configuration
A 1s2 2s2 2p6 3s2 3p1
Possible Set of Quantum Numbers for Outermost Electron
n l ml ms ½

3. Orbital Filling Rules Worksheet
Element Incorrect Configuration
B 1s2 2s3
Rule Violation Correct Configuration
B 1s2 2s2 2p1
Possible Set of Quantum Numbers for Outermost Electron
n l ml ms ½

4. Orbital Filling Rules Worksheet
Element Incorrect Configuration
P 1s2 2s2 2p6 3p5
Rule Violation Correct Configuration
A 1s2 2s2 2p6 3s2 3p3
Possible Set of Quantum Numbers for Outermost Electron
n l ml ms ½

5. Orbital Filling Rules Worksheet
Element Incorrect Configuration
Cu [Ar] 4s2 3d9
Rule Violation Correct Configuration
D [Ar] 4s1 3d10
Possible Set of Quantum Numbers for Outermost Electron
n l ml ms ½

6. Orbital Filling Rules Worksheet
Element Incorrect Configuration
C 1s2 2s1 2px1 2py1 2px1
Rule Violation Correct Configuration
A 1s2 2s2 2px1 2py1
Possible Set of Quantum Numbers for Outermost Electron
n l ml ms ½

7. Orbital Filling Rules Worksheet
Element Incorrect Configuration
C 1s2 2s1 2px2
Rule Violation Correct Configuration
C 1s2 2s2 2px1 2py1
Possible Set of Quantum Numbers for Outermost Electron
n l ml ms ½

8. Orbital Filling Rules Worksheet
Element Incorrect Configuration
Ag [Kr] 5s2 4d9
Rule Violation Correct Configuration
D [Kr] 5s1 4d10
Possible Set of Quantum Numbers for Outermost Electron
n l ml ms ½

9. Orbital Filling Rules Worksheet
Element Incorrect Configuration
Mn [Ar] 4s1 3d6
Rule Violation Correct Configuration
A [Ar] 4s2 3d5
Possible Set of Quantum Numbers for Outermost Electron
n l ml ms ½

10. Orbital Filling Rules Worksheet
Element Incorrect Configuration
Ni [Ar] 4s2 3dxy2 3dxz2 3dyz2 3dz22 3dx2-y20
Rule Violation Correct Configuration
C [Ar] 4s2 3dxy2 3dxz2 3dyz2 3dz21 3dx2-y21
Possible Set of Quantum Numbers for Outermost Electron
n l ml ms ½

11. Orbital Filling Rules Worksheet
Element Incorrect Configuration
Sc [Ar] 3d3
Rule Violation Correct Configuration
A [Ar] 4s2 3d1
Possible Set of Quantum Numbers for Outermost Electron
n l ml ms ½

12. Orbital Filling Rules Worksheet
Element Incorrect Configuration
B 1s2 2s1 2px1 2py1
Rule Violation Correct Configuration
A 1s2 2s2 2px1
Possible Set of Quantum Numbers for Outermost Electron
n l ml ms ½

13. Orbital Filling Rules Worksheet
Element Incorrect Configuration
Na 1s2 2s2 2p6 3s2
Rule Violation Correct Configuration
A 1s2 2s2 2p6 3s1
Possible Set of Quantum Numbers for Outermost Electron
n l ml ms ½

14. Orbital Filling Rules Worksheet
Element Incorrect Configuration
S [Ne] 3s2 3px2 3py2
Rule Violation Correct Configuration
C [Ne] 3s2 3px2 3py1 3pz1
Possible Set of Quantum Numbers for Outermost Electron
n l ml ms ½

15. Orbital Filling Rules Worksheet
Element Incorrect Configuration
V [Ar] 3d 5
Rule Violation Correct Configuration
A [Ar] 4s2 3d 3
Possible Set of Quantum Numbers for Outermost Electron
n l ml ms ½

16. Orbital Filling Rules Worksheet
Element Incorrect Configuration
P [Ne] 3s2 3px2 3py1
Rule Violation Correct Configuration
C [Ne] 3s2 3px1 3py1 3pz1
Possible Set of Quantum Numbers for Outermost Electron
n l ml ms ½

17. Orbital Filling Rules Worksheet
Element Incorrect Configuration
Kr [Ar] 4s2 3d 16
Rule Violation Correct Configuration
B [Ar] 4s2 3d 10 4p6
Possible Set of Quantum Numbers for Outermost Electron
n l ml ms ½

18. Orbital Filling Rules Worksheet
Element Incorrect Configuration
Cr [Ar] 4s2 3d 4
Rule Violation Correct Configuration
D [Ar] 4s1 3d 5
Possible Set of Quantum Numbers for Outermost Electron
n l ml ms ½

19. Chapter 7: Atomic Structure & Periodicity
Orbital Filling Rules Worksheet