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MHT CET20242 May 2024Morning ShiftChemistryClassification of Elements and Periodicity in PropertiesActual

What is the total number of unpaired electrons in an element placed at period-4 and group-12 either in excited or at ground state?

Options

  1. AZero
  2. BOne
  3. CTwo
  4. DThree

Correct answer

A. Zero

Step-by-step solution

Zn belongs to period 4 and group 12 of the periodic table. aligned & Zn ( ground state )=[ Ar ] 3 ~d ¹⁰ 4 ~s ^2 & Zn ²⁺( excited state )=[ Ar ] 3 ~d ¹⁰ aligned

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