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21 July, 05:34

Which element is paired with an excited-state electron configuration for an atom of the element? (1) Ca: 2-8-8-2 (2) Na: 2-8-2 (3) K: 2-6-8-3 (4) F: 2-8

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  1. 21 July, 09:08
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    3. 2-6-8-3 is an excited state combination, an easy way to identify this is that the 2nd orbital is not filled while the next orbital has been filled instead.
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