Transition and Inner Transition Elements — Chemistry STD 12 Science — Question
Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryTransition and Inner Transition Elements2 Marks
Question
Iron exhibits $+2$ and $+3$ oxidation states. Write their electronic configuration. Which will be more stable? Why?
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Answer
$i.$ Electronic configuration of $Fe^{2+} : 1s^2 2s^2 2p^6 3s^2 3p^6 3d^6$
$ii.$ Electronic configuration of $Fe3+ : 1s^2 2s^2 2p^6 3s^2 3p^6 3d^5$
$iii. \ Fe^{3+}$ is more stable than $Fe^{2+}.$ This is due to the presence of half filled $‘d \ ’$ orbital in $Fe^{3+}.$
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