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 D2,3 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.