Which of the following is not a permissible arrangement of electrons in an atom?

  • Option 1)

    n=5,l=3,m=0,s=+1/2

  • Option 2)

    n=3,l=2,m=-3,s=-1/2

  • Option 3)

    n=3,l=2,m=-2,s=-1/2

  • Option 4)

    n=4,l=0,m=0,s=-1/2

 

Answers (1)
D Divya Saini

As learnt in

Magnetic Quantum Number (m) -

 For any sub-shell (defined by ‘l ’value) 2\: l+1values of m are possible and these values are given by :

m = – l , – ( l –1), – ( l – 2)... 0,1... ( l – 2), ( l –1),l

-

 

 \therefore for l=2, m can have -2, -1, 0, 1, 2 as possible values and not -3.


Option 1)

n=5,l=3,m=0,s=+1/2

This solution is incorrect

Option 2)

n=3,l=2,m=-3,s=-1/2

This solution is correct

Option 3)

n=3,l=2,m=-2,s=-1/2

This solution is incorrect

Option 4)

n=4,l=0,m=0,s=-1/2

This solution is incorrect

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