1
$\begingroup$

I'm confused. Iron has 26 electrons and I wrote down $\ce{1s^2, 2s^2, 2p^6, 3s^2, 3p^6, 4s^2, 3d^6}$ yet my answer booklet says $\ce{1s^2, 2s^2, 2p^6, 3s^2, 3p^6}$ but that is only 18. How can it be 18 if $\ce{Fe}$ (iron) is 26? What am I doing wrong?

Thank You

$\endgroup$

closed as off-topic by Mithoron, Martin - マーチン Oct 4 '18 at 18:46

  • This question does not appear to be about chemistry within the scope defined in the help center.
If this question can be reworded to fit the rules in the help center, please edit the question.

  • 2
    $\begingroup$ I'm voting to close this question as off-topic because the answer summarises in you're right and book wrong. $\endgroup$ – Mithoron Oct 3 '18 at 20:33
  • 2
    $\begingroup$ @Mithoron - I disagree. RTStriker made a huge mistake. "What am I doing wrong? " You believed the book was infallible. ;-) $\endgroup$ – MaxW Oct 3 '18 at 21:31
  • 3
    $\begingroup$ Many books have an erratum list somewhere. You might try to look yours up for other stupid mistakes. $\endgroup$ – MaxW Oct 3 '18 at 21:33
  • $\begingroup$ @Mithoron I'd leave it open. It's a good example for an acceptable homework question: RTStriker describes their assignment, their own solution AND the reason for their doubts. I don't see, why "your book is wrong" was a valid close reason. $\endgroup$ – Arsak Oct 4 '18 at 10:22
  • $\begingroup$ @Marzipanherz No, this is example of question, that even if not closed, should get later deleted in "Spring Cleaning" $\endgroup$ – Mithoron Oct 4 '18 at 13:58