Name:  _____________________                                 date:  __________________                           period: _______

ch. 11 AO, electron configuration, periodic trends      test      40 points                               chemistry

1. Sketch the __ atomic orbital and include the x-, y-, and / or z- axis to  illustrate the AO’s orientation with respect to the axis(es).   [6 points]

a. pz

b. dxz

2.  Describe an atomic orbital – what does it represent ?  [4 points]

3.  Write the electron configuration for ___ using the inert gas short-hand notation and identify all valence- and core- electrons.  [10 points]

a. Silicon

i. Valence electrons = ___________________________________________

ii. Core electrons =  _____________________________________________

b. Arsenic

i.valence electrons = ___________________________________________

ii. Core electrons =  _____________________________________________

3. Sketch the orbital diagram for  __ using the inert gas short-hand notation.  [10 points]

a. nitrogen

b. sulfur

4. Which atom, boron or aluminum, has the larger atomic size ?  justify / rationalize.  [5 points]

5. Which atom, silicon or sulfur, has the larger first ionization energy ?  justify / rationalize.  [5 points]