5.3. Electron Arrangement in Atoms http://www.ck12.org
Problems
- Using only the atomic number, construct orbital filling diagrams for the following elements. Note: none are
exceptions to the Aufbau principle.
a. boron (Z= 5)
b. sulfur (Z= 16)
c. nickel (Z= 28)
d. rubidium (Z= 37) - Using only the atomic number, write full electron configurations for the following elements.
a. fluorine (Z= 9)
b. calcium (Z= 20)
c. zirconium (Z= 40)
d. europium (Z= 63) - Write the electron configurations for the four elements in question #6 using noble gas notation.
- How many electrons are in the second principal energy level of each element below?
a. sodium
b. nitrogen
c. beryllium - How many principal energy levels are completely filled in atoms of each of the following elements?
a. argon
b. ruthenium
c. barium - How many principal energy levels are occupied in atoms of the elements listed in question #9?
- How many sublevels are occupied in an atom of aluminum? How many are completely filled?
- Which elements have completely filledsandpsublevels in their outermost principal energy level?
- Fill in the following table (Table5.9). Use a periodic table to find the atomic numbers. All elements in this
problem follow the conventional Aufbau order for filling sublevels.
TABLE5.9: Table for Problem 13
O K Fe Kr Cd I Pu
Total
number of
occupied
principal
energy
levels
Number of
completely
filled
principal
energy
levels
Total num-
ber of oc-
cupied sub-
levels