# total number of possible unique sts of gour quantum numbers in the 5th shell of an atom ,if it is complatey filled :

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total number of possible unique sts of gour quantum numbers in the 5th shell of an atom ,if it is complatey filled :
A. 20
B. 5
C. 25
D. 50

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No . Of e^(-) = 2n^(2)=50