WORKSHEET: Arrow-Orbital Diagrams

1)    What do the short, horizontal lines represent? 



2)    Some of the arrows go up and some go down.  Why do they do this?






3)    There is an arrow going up on the left side of every arrow-orbital diagram.  Why?







4)    Please draw the arrow orbital diagrams for Boron and Astatine (you probably want to do At on the back with your paper horizontally)


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