Which one of the following ions has the same number of unpaired electrons as present in V3+?
a) Ti3+ b) Fe3+ c) Ni2+ d) Cr3+
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Answer:
Ni 2+
Explanation:
electronic configuration of v is [Ar] 4s2 3d3
electronic configuration of v+3 is [Ar] 3d2 so it has 2 unpaired electrons
electronic configuration of nickel is [Ar] 4s2 3d8
electronic configuration of Ni 2+ is [Ar] 3d8 so it has also 2 unpaired electrons
ask me if any doubts please
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