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Question

Choose the correct pair regarding the properties given in the bracket.


A
4d>5s (angular node)
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B
4d=4s (angular~node)
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C
4d>4s (radial~node)
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D
4s=3s (radial~node)
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Solution

The correct option is A 4d>5s (angular node)

(a) Number of angular node = l
So, 4d (l=2) angular node = 2
and 5s (l=0) angular node = 0
Therefore, number of angular nodes of 4d>5s.

(b) Number of angular node = l
So, 4d (l=2) angular node = 2
and 4s (l=0) angular node = 0
Therefore, number of angular nodes of 4d>4s.

(c) Number of radial node = nl1
So, 4d (n=4,l=2) radial node = 421=1
and 4s (n=4,l=0) radial node = 401=3
Therefore, number of radial nodes of 4d<4s.

(d) Number of radial node =nl1
So, 4s (n=4,l=0) radial node = 401=3
and 3s (l=0) radial node = 301=2
Therefore, number of radial nodes of 4s>3s.


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