Ch. 4 & 5 atomic structure & electrons in atoms                     test                   45 points                      honors chemistry

1. What’s an atomic orbital ?  include the term, probability, in your response. [2 points]

2. Sketch the ___ AO and include the x-, y-, and / or z- axis to illustrate the AO’s orientation with respect to these axis. [4 points]

a. pz

b. dxy

3. What is electron spin and its implication in regards to the maximum number of electrons in an orientation of an AO. [2 points]

4. Fill-in the blank.  [4 points]

a.  s AO has   ____ orientation(s)

b.  p AO has   ____ orientation(s)

c. d AO has   ____ orientation(s)

d. f AO has   ____ orientation(s)

5. Fill-in the below table; the below atom / ion may not exist.  [13 points]

symbol

# protons

# neutrons

# electrons

charge

Atomic mass

57Fe +2

 

 

 

 

 

 

98

 

 

0

198

 

 

15

18

- 2

 

6. A hypothetical sample contains ___   [7 points]

1,250  isotopes of 12C
750    isotopes of 13C
500    isotoeps of 14C

isotopes; based on this information, what is the average atomic mass of carbon ?  show your work.

7. What is the electron configuration of lead ?  identify the valence electrons.  [5 points]

8.  Sketch the orbital diagram of phosphorus.  [5 points]

9. What is the electron configuration of silicon ?  identify the valence- and core- electrons.  [5 points]