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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)`underset(l=0)overset(l=n)sum2(2l+1)`
(b)`underset(l=1)overset(l=n)sum2(2l+1)`
(c)`underset(l=0)overset(l=n)sum2(2l+1)`
(d)`underset(l=0)overset(l=n-1)sum2(2l+1)`

A

`underset(l=1)overset(l=n)(sum)2(2l+1)`

B

`underset(l=1)overset(l=n-1)(sum)2(2l+1)`

C

`underset(l=0)overset(l=n+1)(sum)2(2l+1)`

D

`underset(l=0)overset(l=n-1)(sum)2(2l+1)`

Text Solution

Verified by Experts

The correct Answer is:
D
`lambda=v " "lambda=(h)/(mv)`
`lambda^(2)=(h)/(m)implies lambda=((h)/(m))`
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