Number of complexes from the following with even number of unpaired "d" electrons is____.
[V(H2O)6]3+, [Cr(H2O)6]2+, [Fe(H2O)6]3+, [Ni(H2O)6]3+, [Cu(H2O)6]2+
[Given atomic numbers : V = 23, Cr = 24, Fe = 26, Ni = 28, Cu = 29]
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Number of complexes from the following with even number of unpaired "d" electrons is____.
[V(H2O)6]3+, [Cr(H2O)6]2+, [Fe(H2O)6]3+, [Ni(H2O)6]3+, [Cu(H2O)6]2+
[Given atomic numbers : V = 23, Cr = 24, Fe = 26, Ni = 28, Cu = 29]