In an atom, the total number of electrons with quantum numbers n=4,l=2ands=+12 are :
A
10
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B
5
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C
7
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D
14
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Solution
The correct option is B
5 n=4,l=2ands=+12 The above quantum numbers is the description of 4d subshell with spin s=+12.
Number of orbitals in a d subshell with l = 2 is 2l+1 = 2×2+1 = 5.
Total number of electrons possible since each orbital can have maximum of 2 electrons is 10. The number of electrons with spin quantum number s=+12 are 5 The other 5 electrons will have the spin quantum number s=−12