Question

Maximum number of radial nodes is present in:

• A. $5s$
• B. $5p$
• C. $5d$
• D. all have same number of nodes

Answer 1

Answer: (A)

$5s$

Number of radial nodes $=n-l-1$, where $l=$ azimuthal quantum number and $n=$ orbit number

For s subshell value of $l$ is 0

and for p subshell value of $l$ is 1

and for d subshell value of $l$ is 2.

Thus the value of $l$ is minimum for s shell so the value of the number of nodes is maximum for s subshell.