Exercise on Finding Finding configuration of Ar Atom: Solutions

Question: The ground-state electron configuration of [Ar]4s23d5 is:.................

  1. 39.1K19

  2. 54.9Mn25

  3. 52.0Cr24

  4. 50.9V23

Solution:
Counting the total # of electrons we have; (18 +2+5 = 25).
This obviously indicates that the element is:

Mn25;
So, the answer (B).


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Date of last modification: Summer , 2019