### Nodal Planes

Posted:

**Tue Oct 23, 2018 11:15 pm**So the book says that nodal planes separate the two lobes of a p-orbital where the wave function is 0. How come s orbitals do not have a nodal plane?

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=20&t=34706

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Posted: **Tue Oct 23, 2018 11:15 pm**

So the book says that nodal planes separate the two lobes of a p-orbital where the wave function is 0. How come s orbitals do not have a nodal plane?

Posted: **Tue Oct 23, 2018 11:47 pm**

S-orbitals fully encompass the area around the nucleus. There is no area surrounding the nucleus in an s-orbital where the probability of finding an electron is 0, which is what a nodal plane defines, so there is no nodal plane for the s-orbital.

Posted: **Tue Oct 23, 2018 11:54 pm**

Also, if you look at the shape of an s-orbital when graphed out, you see on the axis that there are no spots on any of the axis planes where electrons cannot be present. Nodal planes denote where electrons cannot be observed, but since the s-orbital is a sphere that encompasses all the axes, there are no nodal planes.

Posted: **Wed Oct 24, 2018 12:21 pm**

How do you determine how many subshells there are from an n value, for example if n = 3, how can you determine subshells from this?

Posted: **Wed Oct 24, 2018 6:45 pm**

isarose00 wrote:How do you determine how many subshells there are from an n value, for example if n = 3, how can you determine subshells from this?

Subshells are basically the angular momentum l, and l is n-1. So, for this case l = 2 and the subshells would be 0,1,2.

Posted: **Thu Oct 25, 2018 12:21 pm**

The shape of s orbital is spherically symmetrical and there is no point of region where you can find that the electron probability density is zero.

Posted: **Thu Oct 25, 2018 9:30 pm**

Ryan Danis 1K wrote:So the book says that nodal planes separate the two lobes of a p-orbital where the wave function is 0. How come s orbitals do not have a nodal plane?

s orbitals do not have a nodal plane because it is the only orbital that has a symmetrical electron probability distribution and is a spherical shape, unlike the others which are shaped more like lobes.