Q. 195.0( 5 Votes )

Which of the following sets of quantum numbers are correct?



A. (i)

B. (ii)

C. (iii)

D. (iv)

Answer :

o The principal quantum number n is allowed to have l (azimuthal quantum numbers) values from 0 up to (n-1), i.e.1 number less than the value of n which is present in the two options -


(ii)2, 1, +1 and (iii) 3, 2, –2 where both the l (sub-shell) values are less than the n values(main shell) and magnetic quantum number ml values are also justified ( as -l to +l values are allowed).


The other 2 options (i) 1 1 +2 and (iv) 3 4 –2


incorrect because here the l values are written equal and greater than the n values respectively.

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