Question

Which of the following statements about the probability distribution is untrue?

• A. The number of maxima of the graph plotted between ${\psi }^2{r}^2$ vs distance from nucleus of $2s$ orbital are two
• B. The number of spherical or radial nodes is equal to $n-l-1$
• C. The number of angular nodes is $l$
• D. $3d_{z^2}$ has two nodal planes

Answer 1

The correct option is D $3d_{z^2}$ has two nodal planes

The number of maxima of the graph plotted between ${\psi }^2{r}^2$ vs distance from nucleus of $2s$ orbital are two.


We know,
Total number of nodes $=n-1$
The number of spherical or radial nodes $=n-l-1$
The number of angular nodes is $l$.

Since $3d_{z^2}$ orbital has two conical nodal surfaces, it does not have nodal planes