Question

The quantum number of 4 electrons are given below
a) n=4, 1=2, m = -2,5= -1/2
b) n=3, 1=2, m=1, s= +1/2
c) n=4, 1=1, m=0, s=+1/2
d) n=3, 1=1, m=1, s= -1/2
The correct order of their increasing energies will be -
a) 1<3<2<4
b) 4<2<3<1
c) 1<2<3<4
d) 4<3<2<1
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Answer 1

Answer: (b)

Explanation:

a) is 4d

b) is 3d

c) is 4p

d) is 3p

So (b) is correct option