chemistry

How many electrons are in the highest energy orbital of the element copper? There is 1 in the outermost shell but what about the highest energy orbital?

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  1. the electron configuration for Cu is [Ar]3d10 4s1 so there is one electron in the hightest energy orbital (4s)

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    bobpursley
  2. That was what I put as my answer but my teacher marked it wrong and said "this is asking for the highest energy orbital versus the outermost shell." But in my book it has 1 as the highest energy orbial:/

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