Shape Names

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

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Wasila Sun 2I
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Shape Names

Postby Wasila Sun 2I » Wed Nov 18, 2020 10:27 am

What is the shape called when there are 2 lone pairs and 2 bonding pairs like H2O? Is "bent" the official shape name?

Frankie Mele 3J
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Re: Shape Names

Postby Frankie Mele 3J » Wed Nov 18, 2020 10:30 am

Yes, when 2 of 4 possible bonding regions are occupied by lone pairs, the shape is referred to as angular or bent.

Libby Dillon - 1A
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Re: Shape Names

Postby Libby Dillon - 1A » Wed Nov 18, 2020 11:11 am

For H20, there are four regions of electron density, but two are occupied by lone pairs of electrons. This means the other two regions are occupied by bonded electron pairs, which is what we name shaped based off of. The name for this shape is bent or angular when two of four regions of electron density are considered.

Madisen Brown -1C
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Re: Shape Names

Postby Madisen Brown -1C » Wed Nov 18, 2020 6:52 pm

Yep! The shape is known as bent or angular because 2 of the 4 bonding sites are lone pairs and the lone pairs force the bonding electrons closer which decreases the bond angle.

DMaya_2G
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Re: Shape Names

Postby DMaya_2G » Wed Nov 18, 2020 10:49 pm

Angular molecules, which are also called bent or V-shaped have a non-linear shape. For example, a water molecule has two unshared lone pairs and two pairs of bonded electrons.

Lorraine Jiang 2C
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Re: Shape Names

Postby Lorraine Jiang 2C » Wed Nov 18, 2020 11:46 pm

Yes, the shape of H2O can either be bent or angular.

Anirudh Mahadev 1G
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Re: Shape Names

Postby Anirudh Mahadev 1G » Thu Nov 19, 2020 3:32 pm

Yes, and keep in mind that the shape is also called bent when referencing a molecule with two bonds and one lone pair. For example, Sulfur dioxide would have a trigonal planar electron pair geometry and a bent molecular geometry.

Aayushi Jani 3A
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Re: Shape Names

Postby Aayushi Jani 3A » Thu Nov 19, 2020 4:46 pm

Yes, it is called bent as there are two lone pairs of electrons and two pairs of bonded electrons.

arisawaters2D
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Re: Shape Names

Postby arisawaters2D » Thu Nov 19, 2020 9:27 pm

When there are two lone pairs, do we always try to place them at opposite ends, like as far away from each other as possible?

Morgan Gee 3B
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Re: Shape Names

Postby Morgan Gee 3B » Thu Nov 19, 2020 11:42 pm

When there are two lone pairs and two bonded atoms, it is called bent.

Luveia Pangilinan 1A
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Re: Shape Names

Postby Luveia Pangilinan 1A » Thu Nov 19, 2020 11:49 pm

this will be called a bent! :D

Shrinidhy Srinivas 3L
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Re: Shape Names

Postby Shrinidhy Srinivas 3L » Fri Nov 20, 2020 9:39 am

To whoever asked, typically when you have two lone pairs, you do try to place them far away from each other as lone pairs repel each other. Hope this helps!

Catherine Bubser 2C
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Re: Shape Names

Postby Catherine Bubser 2C » Fri Nov 20, 2020 6:54 pm

Bent or angular can be used interchangeably for this!

Madison Muggeo 3H
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Re: Shape Names

Postby Madison Muggeo 3H » Fri Nov 20, 2020 7:26 pm

This will be bent. I'm not sure how to attach a picture on this website, but there are some really good graphics of the VSEPR table with lots of useful information. Once you memorize these tables, it becomes easier :)

Joshua Eidam 2A
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Re: Shape Names

Postby Joshua Eidam 2A » Sat Nov 21, 2020 12:33 am

Like the person above mentions, there are a lot of really great graphics that display all the different shapes based on lone pairs and such. Here is a link to a website with a graphic that I find quite helpful: https://courses.lumenlearning.com/bound ... -geometry/
Hope this helps!

Sejal Parsi 3K
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Re: Shape Names

Postby Sejal Parsi 3K » Sat Nov 21, 2020 4:31 am

Yes, it can be called bent or angular!

Pranav Daggubati 3C
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Re: Shape Names

Postby Pranav Daggubati 3C » Sat Nov 21, 2020 10:57 am

The electron structure is tetrahedral, but the molecular structure is bent. Lone pairs count for the first one but not for the second.

Crystal Pan 2G
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Re: Shape Names

Postby Crystal Pan 2G » Sat Nov 21, 2020 5:42 pm

This kind of shape can be called angular or bent.

Justin Lin 1B
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Re: Shape Names

Postby Justin Lin 1B » Sat Nov 21, 2020 5:51 pm

Any molecule with 2 lone pairs and 2 bonding pairs is called bent. Bent is its official name

Adam Bustamante 1I
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Re: Shape Names

Postby Adam Bustamante 1I » Sat Nov 21, 2020 5:51 pm

You're correct, the shape name is bent! It could also be angular, but bent is perfectly acceptable :)

Jerry_T
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Re: Shape Names

Postby Jerry_T » Sat Nov 21, 2020 11:34 pm

The shape is commonly referred to as either bent or angular. Some examples of this are H2O and NO2- (due to their lone pair(s)).

Margaret Xu 3C
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Re: Shape Names

Postby Margaret Xu 3C » Tue Nov 24, 2020 4:43 pm

Reiterating what people have said before, we can say angular or bent when referring to the shape. I don't think it matters which one we use but I think the textbook refers to it as angular.

Taber Ball 1F
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Re: Shape Names

Postby Taber Ball 1F » Tue Nov 24, 2020 4:52 pm

Wasila Sun 1K wrote:What is the shape called when there are 2 lone pairs and 2 bonding pairs like H2O? Is "bent" the official shape name?


Hi! The official name would be bent or angular. An example of this would be H2O. Here is a link to a chart that I have found very helpful with learning the names of the various shapes.

https://ds055uzetaobb.cloudfront.net/im ... 091b2c.png

Hope that helps!

derickngo3d
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Re: Shape Names

Postby derickngo3d » Tue Nov 24, 2020 7:57 pm

That is a bent shape.

Mingzi Yang 1E
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Re: Shape Names

Postby Mingzi Yang 1E » Tue Nov 24, 2020 10:28 pm

The shape of H2O is bent.

Carly_Lipschitz_3H
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Re: Shape Names

Postby Carly_Lipschitz_3H » Tue Nov 24, 2020 10:31 pm

When there are 2 lone pairs and 2 bonding pairs like H2O, it is called "bent" or "angular".

Alessia Renna 1D
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Re: Shape Names

Postby Alessia Renna 1D » Wed Nov 25, 2020 11:06 am

yes it would be angular/bent (or AX2E2)

Ariel Guan 1H
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Re: Shape Names

Postby Ariel Guan 1H » Thu Nov 26, 2020 3:28 pm

yes, it is called bent or angular.

Massimo_Capozza_1G
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Re: Shape Names

Postby Massimo_Capozza_1G » Thu Nov 26, 2020 5:15 pm

Hi I found this website very useful to study molecular geometry

http://intro.chem.okstate.edu/1314F00/Lecture/Chapter10/VSEPR.html

Neel Bonthala 2G
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Re: Shape Names

Postby Neel Bonthala 2G » Thu Nov 26, 2020 5:21 pm

Yes, the shape is just called bent. Bent can also result from a molecular geometry of 3 regions of electron density, and one lone pair! The bond angles will be different between these two configurations of the bent shape though.

Lorraine Medina 3E
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Re: Shape Names

Postby Lorraine Medina 3E » Thu Nov 26, 2020 11:20 pm

You can use bent or angular for the name. Hope this helps!

gabbi_r2C
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Re: Shape Names

Postby gabbi_r2C » Fri Nov 27, 2020 12:21 am

Yes, bent is the official shape name, no matter whether there are two lone pairs on the central atom or one.

Jack_Pearce_2H
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Re: Shape Names

Postby Jack_Pearce_2H » Fri Nov 27, 2020 1:09 am

usually called bent/v-shaped. I would specifically identify it by saying the AX2E2 general formula has <109.5 degree bond angles and usually rests around 104.5 degrees

Tiao Tan 3C
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Re: Shape Names

Postby Tiao Tan 3C » Fri Nov 27, 2020 2:02 am

You are correct. It can be called angular or bent.

Navdha Sharma 3J
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Re: Shape Names

Postby Navdha Sharma 3J » Fri Nov 27, 2020 3:36 am

Yes, the shape of the water molecule is bent or angular.

Becca Nelson 3F
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Re: Shape Names

Postby Becca Nelson 3F » Fri Nov 27, 2020 1:08 pm

The shape of the water molecule or any AX2E2 molecule is bent or angular. The electron density distribution is in a tetrahedral shape however.

Mary Gallo 1G
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Re: Shape Names

Postby Mary Gallo 1G » Fri Nov 27, 2020 2:25 pm

Yes, when there are 4 regions of electron density and 2 are bonding then the VSEPR shape can be referred to as bent or angular.

Eunice_Castro_1G
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Re: Shape Names

Postby Eunice_Castro_1G » Fri Nov 27, 2020 2:46 pm

Hi! The shape of which you described is called angular or bent.

Mary Shih 3J
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Re: Shape Names

Postby Mary Shih 3J » Fri Nov 27, 2020 8:18 pm

you can call it bent or angular they're the same

Brandon Le 3C
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Re: Shape Names

Postby Brandon Le 3C » Fri Nov 27, 2020 9:10 pm

There are a variety of names that are all correct. Some people have already listed them: bent, angular, v-shape, non-linear, etc. All of these are correct and you basically just need to understand the concept behind it.

105618850
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Re: Shape Names

Postby 105618850 » Fri Nov 27, 2020 11:40 pm

Yes. The lone pairs are what distinguish bent from linear. I believe the repulsion from the lone pairs results in a bent molecular structure.

Stacey Phan 2I
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Re: Shape Names

Postby Stacey Phan 2I » Sat Nov 28, 2020 11:24 am

The textbook refers it to angular but bent is also acceptable.

Lilly Catarozoli 1B
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Re: Shape Names

Postby Lilly Catarozoli 1B » Sat Nov 28, 2020 3:54 pm

Bent and angular are the same thing!

Aria Movassaghi 1A
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Re: Shape Names

Postby Aria Movassaghi 1A » Sun Nov 29, 2020 10:44 pm

Yes, H2O is considered bent.

Micaela Estavillo
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Re: Shape Names

Postby Micaela Estavillo » Sun Nov 29, 2020 10:45 pm

Yes it would be considered bent.

DominicMalilay 1F
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Re: Shape Names

Postby DominicMalilay 1F » Sun Nov 29, 2020 10:46 pm

It would be angular!

Karen Elrayes 1L
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Re: Shape Names

Postby Karen Elrayes 1L » Sun Nov 29, 2020 10:51 pm

It would be considered bent

nayha a 1E
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Re: Shape Names

Postby nayha a 1E » Sun Nov 29, 2020 10:59 pm

This is called a bent shape (:

AlbertGu_2C
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Re: Shape Names

Postby AlbertGu_2C » Sun Nov 29, 2020 11:02 pm

2 lp and 2 bonds is bent, as well as 2 lp and 1 lp. Hope this helps!

Diana Aguilar 3H
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Re: Shape Names

Postby Diana Aguilar 3H » Sun Nov 29, 2020 11:13 pm

The shape would be bent or angular, and you can use either term to describe the shape since they mean the same thing.

joshtully
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Re: Shape Names

Postby joshtully » Sun Nov 29, 2020 11:42 pm

The shape is called "bent."


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