ARRANGEMENT SUMMARY
1. Fill in the following table.
Element 
Atomic # 
Mass # 
# of p^{+} 
# of n^{o} 
# of e^{} 
# of energy levels 
number of e^{} in outer energy level 



20 
20 





89 
38 








74 
53 




27 



3 
3 
2. How do you determine the maximum number of electrons in an energy level?
3. How do you determine the number of sublevels in an energy level?
4. How do you determine the maximum number of orbitals in an energy level?
5. Set up the diagonal rule through 7 lines.
6. What is Hund's Rule?
7. Write the
electron configurations, orbital notations, and electron dot diagrams for the
following elements.
(A) Selenium
(B) Chlorine
(Honors only) 8. Fill in the following chart concerning quantum numbers.
Quantum Number 
Letter Designation 
Information It Tells 
Numerical Value 
Principal (1st) 





sublevel 


m 





+^{1}/_{2} or ^{1}/_{2} 
9. When l = 2, the possible values for m are ______________________.
10. For the element arsenic, assign quantum numbers for its electrons in the outermost energy level.