a) l=4b) l=0,1,3 c) l=3d)All are correct

1.	a) l=4b) l=0,1,3 c) l=3d)All are correct
Answer» There are four quantum numbers for any electron : Principle quantum number (n)= It can take any value from 1, 2 .... Azimuthal quantum number (l) = values from 0 to n-1 magnetic quantum number (m) = m varies from l to -l spin quantum number = -1/2 and +1/2 Thus when n=5 , l can take values from 0 to 4. Thus l = 0,1,2,3,4 but m=3 suggest that l should be greater or equal to 3 .since m can take values from -l to +l only. Thus l = 0,1,2 does not match with the m value 3. Therefore second option is not correct.m cannot be 3 for l=0 or l=1 .

Answer»

There are four quantum numbers for any electron :

Principle quantum number (n)= It can take any value from 1, 2 ....

Azimuthal quantum number (l) = values from 0 to n-1

magnetic quantum number (m) = m varies from l to -l

spin quantum number = -1/2 and +1/2

Thus when n=5 , l can take values from 0 to 4. Thus

l = 0,1,2,3,4

but m=3 suggest that l should be greater or equal to 3 .since m can take values from -l to +l only.

Thus l = 0,1,2 does not match with the m value 3.

Therefore second option is not correct.m cannot be 3 for l=0 or l=1 .

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