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Electronic configuration of Co is [Ar] 4s 2 3d 7 And the electronic configuration of Zn [Ar] 4s 2 3d 10 . Since zinc has no unpaired electron electron so it will be repelled by magnetic field.

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The d-And-f-Block Elements

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286.
Which one of the two Co or Zn would be repelled by a magnetic field?

Electronic configuration of Co is [Ar] 4s² 3d⁷ And the electronic configuration of Zn [Ar] 4s² 3d¹⁰. Since zinc has no unpaired electron electron so it will be repelled by magnetic field.

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