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    Activity 7: There are two elements that do not follow ALL of the rules of the sub-shell notation. What are these two elements and how are they different?
    i know it is chromuim and copper but how are they different from the rest.

    What are the electronic configurations of Cr and Cu?

    If they followed the trends of their neighbours, what would you have expected their electronic configurations to have been?

    (Poor Q, BTW, they DO follow the rules. It is just that the rules you are applying are wrong. How dare your teacher tell them that they are not following the rules, they wrote the rules.)
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