Question

write the set of quantum number of 23rd electron in Ferric ion

Answer 1

Fe→3,2,−2,±12  
For iron, [Ar]4s23d6 , then n=3 , l=2 (because it is the d orbital), ml is −2 (because you count up one the series from −l to +l six times, for the six electrons in the d subshell) and ms is ±12 .

Answer 2

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For iron, [Ar]4s23d6 , then n=3 , l=2 (because it is the d orbital), ml is −2 (because you count up one the series from −l to +l six times, for the six electrons in the d subshell) and ms is ±12 .