2. p-orbitals
S-orbitals

3. 2 electrons are in the 6th level
#30 How many electrons are in the highest occupied energy level of these atoms:
Barium
2 electrons are in the 6th level

4. Sodium
1 electrons are in the 3th level

5. Aluminum
3 electrons are in the 3th level

6. Oxygen
6 electrons are in the 2nd level

7. #31
aufbau principle
Pauli exclusion principle
Hund’s rule

8. #32
Write the electron configurations for
the elements that are identified only by
these atomic numbers.
15: 1s22s22p63s23p3
phosphorous

9. 12: 1s22s22p63s2 Magnesium #32 Write the electron configurations for
the elements that are identified only by
these atomic numbers.
12: 1s22s22p63s2
Magnesium

10. 9: 1s22s22p5 fluorine #32 Write the electron configurations for
the elements that are identified only by
these atomic numbers.
9: 1s22s22p5
fluorine

11. 18: 1s22s22p63s23p6 argon #32 Write the electron configurations for
the elements that are identified only by
these atomic numbers.
18: 1s22s22p63s23p6
argon

12. # of electrons in sublevel
#33 What is meant by 3p3?
3p3
# of electrons in sublevel
energy level
shape of orbital

13. Na =11 1s22s22p63s1 #34 Give electron configurations for atoms
of these elements:
Na =11
1s22s22p63s1

14. S=16 1s22s22p63s23p4 #34 Give electron configurations for atoms
of these elements:
S=16
1s22s22p63s23p4

15. Mg = 12 1s22s22p63s2 #34 Give electron configurations for atoms
of these elements:
Mg = 12
1s22s22p63s2

16. Ne=10 1s22s22p6 #34 Give electron configurations for atoms
of these elements:
Ne=10
1s22s22p6

17. K=19 1s22s22p63s23p64s1 #34 Give electron configurations for atoms
of these elements:
K=19
1s22s22p63s23p64s1

18. #35 Which of these orbital designations are invalid?OK
a. 4s
b. 3f
c. 2d
d. 3d NO NO OK

19. #36 What is the maximum number of
electrons that can go into each of the
following sublevels?
a. 2s
b. 3p
c. 4s
d. 3d 2 6 2 10

20. #36
e. 4p
f. 5s
g. 4f
h. 5p 6 2 14 6

21. #37 Arrange the following sublevels in
order of increasing energy:
3d, 2s, 4s, 3p 2s 3p 4s 3d

22. #38 How many electrons are in the
second energy level of an atom of
each element?
a. chlorine
b. phosphorous
c. potassium
1s22s22p63s23p5
1s22s22p63s23p3
1s22s22p63s23p64s1

23. 1s22s22p63s23p64s23d10 4p4 1s22s22p63s23p64s23d3 1s22s22p63s23p64s23d8
#39 Write electron configuations for
atoms of these elements:
a. selenium 34
b. vanadium
c. nickel
d. calcium
1s22s22p63s23p64s23d10
4p4
1s22s22p63s23p64s23d3
1s22s22p63s23p64s23d8
1s22s22p63s23p64s2