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Q.

Which of the following sets of quantum numbers is correct for an electron in 3d orbital?

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a

3, 0, 0, +12

b

3, 2, 1, +12

c

3, 1, 1, -12

d

3, 2, 3, -12 

answer is B.

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Detailed Solution

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Set of quantum numbers for an electron in 3d orbital is, n=3,l=2,m=1,s=+12 .

For 3d orbital, the principal quantum number, n=3, for d-orbital l=2

For l=2, m can have values from –l to +l which means from -2 to +2. So possible values of m are -2, -1, 0, +1, +2.  

Spin quantum number can have any value of+12 and -12 as electrons can have any spin.

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