VSEPR notation

(Polar molecules, Non-polar molecules, etc.)

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marlene 1K
Posts: 89
Joined: Wed Sep 30, 2020 9:53 pm

VSEPR notation

Postby marlene 1K » Fri Nov 20, 2020 1:47 pm

Don't know if this has been asked yet, but can the VSEPR notation help us determine the shape of the molecule??

Inderpal Singh 2L
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Joined: Wed Sep 30, 2020 10:02 pm
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Re: VSEPR notation

Postby Inderpal Singh 2L » Fri Nov 20, 2020 1:53 pm

I believe that it can

Lesly Lopez 3A
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Joined: Wed Sep 30, 2020 9:54 pm
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Re: VSEPR notation

Postby Lesly Lopez 3A » Fri Nov 20, 2020 1:56 pm

It can since it tells you how it is formed. The theory says that repulsion among the pairs of electrons on a central atom (whether bonding or non-bonding electron pairs) will control the geometry of the molecule. Hope that helps!

Alexandra Ahlschlager 1L
Posts: 86
Joined: Wed Sep 30, 2020 9:59 pm

Re: VSEPR notation

Postby Alexandra Ahlschlager 1L » Fri Nov 20, 2020 1:59 pm

Yes! To build off of what others have said, molecules with the same VSEPR notation will have the same shape. For example, all molecules with the AX3E notation will have a trigonal pyramidal structure. Hope this helps!

Brianna Martilla 1C
Posts: 101
Joined: Wed Sep 30, 2020 9:58 pm

Re: VSEPR notation

Postby Brianna Martilla 1C » Fri Nov 20, 2020 2:37 pm

I think it can give us a general idea of the shape, but is not always quantitatively accurate, because if the surrounding atoms are not all the same, the bond angles will differ slightly than 'expected'.

Madison Muggeo 3H
Posts: 90
Joined: Wed Sep 30, 2020 9:35 pm

Re: VSEPR notation

Postby Madison Muggeo 3H » Fri Nov 20, 2020 7:32 pm

Yes the notation will help determine the shape but we still need to know the bond angles because these can differ from molecule to molecule because of the different atoms within them :)

Jonathan Batac - 2D
Posts: 99
Joined: Wed Sep 30, 2020 10:03 pm

Re: VSEPR notation

Postby Jonathan Batac - 2D » Fri Nov 20, 2020 11:42 pm

Yes VSEPR notation definitely helps with figuring out the shape of a molecule. A is the central atom and X & E are the two different types of electron regions. Counting the number of Xs and Es, you can find the arrangement (tetrahedral, octahedral, etc), but to find the exact shape you got to take into account the number and effect of lone pairs (E) in relation to the Xs.

Haochen He 3L
Posts: 50
Joined: Wed Sep 30, 2020 9:37 pm

Re: VSEPR notation

Postby Haochen He 3L » Fri Nov 20, 2020 11:49 pm

Yes. I think it can tell you the shape of molecules since it represents the number of bonded atoms and lone pairs.

Emma Strassner 1J
Posts: 87
Joined: Wed Sep 30, 2020 9:50 pm

Re: VSEPR notation

Postby Emma Strassner 1J » Fri Nov 20, 2020 11:53 pm

VSEPR notation can tell you the shape because it tells you the bonded atoms and the pairs. From there you can figure out the bond angles if they're slightly different from expected.

Brett Lieuallen 2A
Posts: 50
Joined: Wed Sep 30, 2020 9:39 pm

Re: VSEPR notation

Postby Brett Lieuallen 2A » Fri Nov 20, 2020 11:59 pm

Yes it helps describe the general shape. It doesn't always help determine which section the lone pairs take up if there are numerous options on a plane. However, this shouldn't matter too much


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