gneet

Study Companion

For more NEET and AIIMS mcq on Structure of Atom Visit www.gneet.com
Question
Q427) Which of the following has maximum number of unpaired electrons? [ IIT 1996]



SOLUTION

E.C 12Mg=[Ne] 3s2 Ec. Mg2+=[Ne] unpaired electrons zero
E.C 22T=[Ar] 4s2 3d2
E.C Ti3+=[Ar] 4s1 unpaired 1 electron E.C 23V=[Ar] 4s2 3d3
V3+=[Ar] 4s1 unpaired 1 electron
E.C 26V=[Ar] 4s2 3d6
Fe3+=[Ar] 4s1 3d3 unpaired 3 electron

Answer:(d)