Molecular Shape Name

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

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Ying Yan 1F
Posts: 101
Joined: Fri Aug 02, 2019 12:16 am

Molecular Shape Name

Postby Ying Yan 1F » Wed Nov 13, 2019 11:47 am

Is it necessary to remember the names of all the molecular shapes? I know linear, triangular planarm, tetrahedral are very common molecular shapes so it's good to remember them, but what about the other shapes such as trigonal bipyramidal, square pyramidal, etc.? Thank you!

Angela Patel 2J
Posts: 110
Joined: Sat Aug 24, 2019 12:17 am

Re: Molecular Shape Name

Postby Angela Patel 2J » Wed Nov 13, 2019 12:15 pm

I think you should try to remember all of them since it will help you remember how the structure looks. It's probably not 100% necessary, but it would be helpful.

KMenjivar_3A
Posts: 25
Joined: Mon Jan 07, 2019 8:05 am

Re: Molecular Shape Name

Postby KMenjivar_3A » Wed Nov 13, 2019 12:41 pm

I recommend to learn all the other shapes, including the ones that contain lone pairs.

SMIYAZAKI_1B
Posts: 63
Joined: Sat Aug 24, 2019 12:15 am

Re: Molecular Shape Name

Postby SMIYAZAKI_1B » Wed Nov 13, 2019 12:49 pm

I would agree with the other students and say that it would definitely help you to understand all of the shape names and also try to remember the bond angles. At least on the midterm, we did have a molecule with more than 8 valence electrons in the valence shell.

Katherine Chhen 3I
Posts: 53
Joined: Fri Sep 28, 2018 12:15 am

Re: Molecular Shape Name

Postby Katherine Chhen 3I » Wed Nov 13, 2019 1:54 pm

Would there be an easier way to memorize all the shape names or how to determine which molecule has what shape?

Kate Osborne 1H
Posts: 102
Joined: Fri Aug 30, 2019 12:16 am

Re: Molecular Shape Name

Postby Kate Osborne 1H » Wed Nov 13, 2019 1:58 pm

I think it's necessary to learn the names for all the shapes that Dr. Lavelle talks about in lecture. I found it easiest to memorize when I looked at all shapes that have the same number of electron domains and memorized them in decreasing bonding domain order.

derinceltik1K
Posts: 51
Joined: Sat Aug 17, 2019 12:15 am

Re: Molecular Shape Name

Postby derinceltik1K » Wed Nov 13, 2019 10:21 pm

It's definitely important to know the geometric names. They are the whole point with VSEPR. And Dr. Lavelle mentioned certain details that we don't need to know like the diagrams where it shows which part of the molecule is closer and which atoms are in the back .
But the shape, name and the angle we are expected to know.

ABombino_2J
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

Re: Molecular Shape Name

Postby ABombino_2J » Thu Nov 14, 2019 3:28 pm

Yes, you should know the shape names as well as the bonding angles. These are easiest to memorize when you look at them in terms of total bonding regions as opposed to individually. You do not need to know how to draw the structure in 3d space, only the lewis structures; 3d will be reserved for organic chem. However, understanding the structure in 3d space will help understand why the bond angles are what they are.

Claire Grover 3G
Posts: 64
Joined: Wed Sep 18, 2019 12:18 am

Re: Molecular Shape Name

Postby Claire Grover 3G » Thu Nov 14, 2019 4:08 pm

My TA said that we have to know all of them, and how to predict which shapes various molecules will be.

Bryce Barbee
Posts: 103
Joined: Wed Sep 18, 2019 12:20 am

Re: Molecular Shape Name

Postby Bryce Barbee » Thu Nov 14, 2019 4:12 pm

I think that we probably just have to know the ones that were said in lecture.

AprilPaz
Posts: 51
Joined: Wed Sep 18, 2019 12:18 am

Re: Molecular Shape Name

Postby AprilPaz » Thu Nov 14, 2019 5:44 pm

It would be helpful to be familiar with all names not just the most common.

Michelle Xie 2B
Posts: 99
Joined: Sat Aug 17, 2019 12:18 am

Re: Molecular Shape Name

Postby Michelle Xie 2B » Thu Nov 14, 2019 7:45 pm

I think we will need to know most of the names.

bellaha4F
Posts: 104
Joined: Wed Sep 18, 2019 12:20 am

Re: Molecular Shape Name

Postby bellaha4F » Thu Nov 14, 2019 8:11 pm

Knowing all of them will be the best I think, test-wise

Jade Hinds 2B
Posts: 75
Joined: Tue Sep 10, 2019 12:16 am

Re: Molecular Shape Name

Postby Jade Hinds 2B » Thu Nov 14, 2019 8:28 pm

We can all agree that based upon what we've recently learned in lecture, VSEPR and molecular shape naming is basically all that will be on test 2!

andrewcj 2C
Posts: 102
Joined: Thu Jul 11, 2019 12:17 am

Re: Molecular Shape Name

Postby andrewcj 2C » Thu Nov 14, 2019 9:22 pm

Some shapes come from others, so it might not be necessary to explicitly memorize every shape. For example, bent comes from a tetrahedral shape with 2 lone pairs, but you don't have have to necessarily memorize bent. Instead, just think about a tetrahedral shape and remove 2 atoms.

Jorge Ramirez_4H
Posts: 54
Joined: Wed Nov 21, 2018 12:19 am

Re: Molecular Shape Name

Postby Jorge Ramirez_4H » Thu Nov 14, 2019 9:34 pm

What's the difference between linear and I think it was bent?

AKatukota
Posts: 100
Joined: Thu Jul 25, 2019 12:18 am

Re: Molecular Shape Name

Postby AKatukota » Thu Nov 14, 2019 10:00 pm

It is helpful to remember the shape names as well as bond angles.

Michelle Le 1J
Posts: 50
Joined: Fri Aug 09, 2019 12:16 am

Re: Molecular Shape Name

Postby Michelle Le 1J » Thu Nov 14, 2019 10:05 pm

Jorge Ramirez_4H wrote:What's the difference between linear and I think it was bent?

The difference between the two is their bond angles, with linear it's 180, while with bent it's about 109.5.


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