JEE Main 2004 — Structure Of Atom Question with Solution
From: AIEEE 2004
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
Choose an option
Show full solutionCorrect option: B
Correct answer
B12 and 5
Step-by-step explanation
Electronic configuration of Cr (Z = 24) =
1s2 2s2 2p6 3s2 3p6 4s1 3d5
For 2p6 and 3p6 , l = 1. Here in 2p and 3p orbital total 6 + 6 = 12 electrons present.
For 3d5 , l = 2. Here in 3d orbital total 5 electrons present.
1s2 2s2 2p6 3s2 3p6 4s1 3d5
For 2p6 and 3p6 , l = 1. Here in 2p and 3p orbital total 6 + 6 = 12 electrons present.
For 3d5 , l = 2. Here in 3d orbital total 5 electrons present.
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This is a previous-year question from JEE Main 2004, covering the Structure Of Atom chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.