Question

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

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

Answer 1

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 = $n-l-1$
So, $4d(n=4,l=2)$ radial node = $4-2-1=1$
and $4s(n=4,l=0)$ radial node = $4-0-1=3$
Therefore, number of radial nodes of $4d<4s$.

(d) Number of radial node =$n-l-1$
So, $4s(n=4,l=0)$ radial node = $4-0-1=3$
and $3s(l=0)$ radial node = $3-0-1=2$
Therefore, number of radial nodes of $4s>3s$.