Exercise on Ground-State Electron Configuration: Solutions

Question: Which of the following elements has a ground-state electron configuration different from the predicted one?

  1. Ca
  2. Xe
  3. Cr
  4. Cl
Solution:
The answer is (C), where the ground state electron configuration of 24Cr is predicted to be: 29Cu: [Ar] 4s2, 3d4
But it is written as: 29Cu: [Ar] 4s1, 3d5


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Date of last modification: Summer , 2019