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Q.

The two electrons have the following sets of quantum numbers
X : 3, 2, – 2 + 1/2.
Y : 3, 0, 0, + 1/2
Which of the following statements is true ?

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a

X has less energy than Y

b

X and Y represent same electron

c

X and Y have same energy

d

X has greater energy than Y

answer is B.

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Detailed Solution

X:3,2,−2,+1/2
In X; orbital =3d
Y:3,0,0,+1/2
In Y; orbital =3s
and we know that
Energy of 3d > 3s

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