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Question

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


A
12 and 4
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B
12 and 5
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C
16 and 4
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D
16 and 5
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Solution

The correct option is B 12 and 5
The ground state electronic configuration of Cr is 1s22s22p63s23p63d54s1
No. of electrons with l=1( p orbital)=6 in 2p6 + 6 in 3p6=12
No. of electrons with l=2  d orbital  =5 in 3d5

Chemistry

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