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If n and l are respectively the principa...

If n and `l` are respectively the principal and azimuthal quantum numbers , then the expression for calculating the total number of electrons in any energy level is :

A

`sum_(l = 0)^(l = n)2 (2l+1)`

B

`sum_(l=1)^(l=n) 2(2l+1)`

C

`sum_(l=0)^(l =n) (2l+1)`

D

`sum_(l=0)^(l=n-1)2(2l+1)`

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The correct Answer is:
D
No. of electrons in energy level concept
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