The elements with the lowest atomic number that has a ground state electronic configuration of (n - 7) d6ns2 is located in the
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a
fifth period
b
sixth period
c
fourth period
d
third period
answer is C.
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Detailed Solution
The elements with the lowest atomic number that has a ground state electronic configuration of (n−1)d6ns2 is iron (Fe). Fe⟶[Ar]183d64s2 is located in fourth period.