Atomic Structure Result Question 18-1

18. The number of radial nodes in $3 s$ and $2 p$ respectively are

(2005,1 M)

(a) 2 and 0

(b) 0 and 2

(c) 1 and 2

(d) 2 and 1

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Answer:

Correct Answer: 18. ( a )

Solution:

  1. The number of radial nodes is given by expression $(n-l-1)$.

For $3 s$, number of nodes $=3-0-1=2$

For $2 p$, number of nodes $=2-1-1=0$