Q.
Which of the following metal is expected to have the highest third ionization enthalpy?
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a
Cr (Z = 24)
b
V (Z=23)
c
Mn (Z = 25)
d
Fe(Z=26)
answer is C.
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Detailed Solution
Mn(Z=25)(Ar)3d54s2↓IP1Mn+(Ar)3d54s1 IP2↓Mn2+(Ar)3d5 (half-filled 3d subshell) ↓IP3
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