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NTA Abhyas JEE Main2020ChemistryStructure of AtomPractice

Consider the following ions 1 . N i 2 + 2 . C o 2 + 3 . C r 2 + 4 . F e 3 + Atomic number: Cr = 24, Fe = 26, Co = 27, Ni = 28. The correct sequence of increasing order of the number of unpaired electrons in these ions is

Options

  1. A1, 2, 3, 4
  2. B4, 2, 3, 1
  3. C1, 3, 2, 4
  4. D3, 4, 2, 1

Correct answer

A. 1, 2, 3, 4

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