link to Chemistry gateway, which contain links to videos about various chemistry concepts - you'll have to find the relevant specific link(s) to do this assignment.

topic(s): electron configuration

questions [26 points; 2 points / question]

1. what is the electron configuration of an atom ? that is, what information is provided by the electron configuration ?

2. what is the Aufbau principle / Madelung rule ? how is it used to develop an atom's electron configuration ?

3. fill-in the below table

atom electron configuration
H  
He  
Li  
N  

4. the following questions will guide you to discover the relationship between an atom's electron configuration and its location in the periodic table. (14 points; not only 2 points)

5. referring to an atom's electron configuration, what is the difference between the valence electrons versus core (or kernal or inner-shell) electrons in an atom ?

6. identify the valence- and core- electrons in __.

a. carbon

b. tin

7. what is the "importance" of valence electrons ?