## Px, Py, Pz

Tara Foroohar 3K
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Joined: Fri Sep 29, 2017 7:06 am

### Px, Py, Pz

Hey guys! So in class, Dr. Lavelle mentioned that labeling an electron configuration as, for example, 2px^1 2py^2 2pz^3, is the same thing as 2p^3 that most of us are familiar with from high school. Do you know if we have to write it out in the first format for exams, etc?

Michelle Lee 2E
Posts: 64
Joined: Thu Jul 27, 2017 3:01 am

### Re: Px, Py, Pz

This is definitely a question worth Chem_Mod to answer though. However, I would say we don't have to because he said in lecture that it was fine if we write it out as just 2p^3. I also believe we won't have to because he mentioned that writing the full configuration out, 2px^1 2px^2 2px^3 just makes it easier to see that we understand where the electrons are going in the write out. I think if we write it fully, that's great. If we write it in the simpler form, also fine.
I also want to ask why exactly do we not have to write out the d-orbitals in the same way? Is it a more difficult understanding or too long? Would we just write it as 3d^...?

Lily Sperling 1E
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Joined: Tue Oct 10, 2017 7:14 am

### Re: Px, Py, Pz

Yes, this is the same as 2p^3 and we are allowed to write it that way; however, Dr. Lavelle said that this notation could be confusing when contemplating paired or parallel electrons so he thinks that the px, y, and z format is much more clear/avoids all confusion and recommends this version. Additionally, when referring to the d orbital, we do not write x, y, or z, the same as many learned in high school. Hope this helped.

deeksha1I
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### Re: Px, Py, Pz

Just to clarify, we only have to include the x, y, and z for the p orbitals? Because the d orbital have nodal planes too.

Mishta Stanislaus 1H
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Joined: Fri Sep 29, 2017 7:04 am

### Re: Px, Py, Pz

I'm curious about this as well, will we be penalized for doing it a different way as him?

AtreyiMitra2L
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### Re: Px, Py, Pz

I believe because this is the way he did it in class, we should be writing it in this manner as the p orbital has these nodal planes

Jordan Foster
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Joined: Fri Sep 29, 2017 7:06 am

### Re: Px, Py, Pz

We are allowed to write it as 2P^3 and receive the same amount of credit. The other way he was explaining is more conceptual and gives a more detailed way of explaining the organization of the electrons. However, both ways are equally effective.

Chem_Mod
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### Re: Px, Py, Pz

You don't have to write in this form.
And we will never have 2pz^3 since there can only be 2 electrons in one orbital.

Daniel Rivas 3L
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Joined: Fri Sep 29, 2017 7:07 am

### Re: Px, Py, Pz

Yeah I was wondering myself about this since he said it was more proper to write Px, Py, and Pz instead of like P3. But i guess it doesn't matter too much.

aaron tang 2K
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Joined: Thu Jul 27, 2017 3:01 am

### Re: Px, Py, Pz

On Wednesday, during the lecture, Lavelle said that you can write it both ways. He prefers that you write in the notation Px, Py, Pz because it is much more specific and it clears up all kinds of confusion when determining paired/parallel electrons.

204918982
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Joined: Fri Sep 29, 2017 7:04 am

### Re: Px, Py, Pz

I think he might prefer if we write it in the Px, Py, Pz form but I don't think we'll be penalized if we write it the other way