The dipositive(2+) ions of how many of the following atoms(s) contain(s) unpaired electrons?
Li, Mg, Fe, AI, CI, Ca, Zn, Ni, Ti, S, P and Si
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1
Answer:
Fe
2+
ion (Z=26) has electronic configuration [Ar]3d
6
4s
0
. It contains 4 unpaired electrons.
Zn
2+
has [Ar]3d
10
electronic configuration. It contains 0 unpaired electrons.
Ni
3+
has [Ar]3d
7
electronic configuration. It contains 3 unpaired electrons.
Cu+ has [Ar]3d
10
electronic configuration. It contains zero unpaired electrons.
Thus, the number of unpaired electrons is maximum in Fe
2+
.
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