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Question

Calculate the minimum and maximum number of electrons which may have magnetic quantum number, m=+1 and spin quantum number, s=−12 in chromium (Cr) :

A
0, 1
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B
1, 2
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C
4, 6
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D
2, 3
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Solution

The correct option is D 2, 3
Out of 6 electrons in 2p and 3p must have one electron with m=+1 and s=12 but in 3d subshell an orbital having m=+1 may have spin quantum no. 12 or +12
Therefore, minimum and maximum posible values are 2 and 3 respectively.

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