errors in chapter 6 - 12th ed.

[Zellmer, Robert]

For the 12th edition of the textbook there's a couple of corrections (that I know about).

1) There is a mistake in the answer to the Give It Some Thought question on
    page 226, part (a).

    For the 3rd shell, n=3, there is 1 3s orbital, 3 3p orbitals and 5 3d
    orbitals for a total of 9 orbitals (n^2).

    The answer states there are 10 3d orbitals.  That's incorrect.  There are 5 d-orbitals
    in any d subshell (immaterial of what shell).  Any d-subshell will have 5 d-orbitals
    and can hold a maximum of 10 electrons (hence 10 transition elements).

2) There's a mistake on page 234 at the bottom of the page.  The electron config. for Se
    is given as [Ar]4s^2 3d^10 4p^4, which is correct.  Then it's given again with the subshells
    arranged in order of inc. principal quantum number as [Ar]3d^10 4s^2 4p^3.  This is
    INcorrect.   Somehow an electron in the 4p was lost.

Dr. Zellmer
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