Unit 8 The D And F Block Elements (Intext Questions-3)
Intext Question
8.3 Which of the $3 d$ series of the transition metals exhibits the largest number of oxidation states and why?
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Answer
$\mathrm{Mn}(\mathrm{Z}=25)=3 d^{5} 4 \mathrm{~s}^{2}$
Mn has the maximum number of unpaired electrons present in the $d$-subshell (5 electrons). Hence, Mn exhibits the largest number of oxidation states, ranging from +2 to +7 .
