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
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