Write the electronic configuration of (i) Mn4+, (ii) Fe3+ (iii) Cr2+ and Zn2+ Mention the number of

unpaired electrons in each case.

1)Manganese has the atomic number 25 and its electronic configuration is  [Ar]4s23d5
Electronic configuration of Mn4+[Ar] 3d3 = 3 unpaired electron
2) Fe has the atomic number 26 and its electronic configuration is [Ar]4s23d6
Electronic configuration of Fe3+[Ar] 3d5 = 5 unpaired electron
3) Cr has the atomic number 24 and its electronic configuration is [Ar]4s13d5
Electronic configuration of Cr2+[Ar] 3d4 = 4 unpaired electron
4 ) Zn has the atomic number 30 and its electronic configuration is [Ar]4s23d10
Electronic configuration of Zn2+[Ar] 3d10 = no unpaired electrons
 

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