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Question

Consider the ground state of Cr atom (z=24). The number of electrons with the azimuthal quantum numbers, l=1 and 2 are, respectively
  1. 16 and 4
  2. 12 and 5
  3. 16 and 5
  4. 12 and 4


Solution

The correct option is B 12 and 5
Electronic configuration of Cr atom (z=24)
=1s2, 2s22p6, 3s23p63d5, 4s1
when l=1, p subshell,
So, total number of electrons in p-subshell=12
when l=2, dsubshell
So, total number of electrons in d-subshell=5
The correct answer will be option (b)

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