Naming Shapes

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

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rikolivares
Posts: 24
Joined: Fri Sep 28, 2018 12:23 am

Naming Shapes

Postby rikolivares » Sun Nov 25, 2018 11:27 pm

Hello! For the exam and tests, is it better to straight up memorize the shape names or is there easy way to derive the names from the number of lone pairs and bonds?

Brian Chang 2H
Posts: 65
Joined: Fri Sep 28, 2018 12:17 am

Re: Naming Shapes

Postby Brian Chang 2H » Sun Nov 25, 2018 11:40 pm

In all honesty, there are only 2 tricky bits to shapes.

1. Tetrahedral angles are 109.5 degrees (Not intuitive like everything else is.)

2. For shapes with 5 regions of electron density, lone pairs are placed along the equatorial plane first instead of the axial plane.

Minsub Lee 3E
Posts: 32
Joined: Fri Sep 28, 2018 12:25 am

Re: Naming Shapes

Postby Minsub Lee 3E » Sun Nov 25, 2018 11:40 pm

For sake of saving time of future exams, I would say that it is best to memorize the shapes.

chaggard
Posts: 37
Joined: Fri Sep 28, 2018 12:19 am

Re: Naming Shapes

Postby chaggard » Sun Nov 25, 2018 11:47 pm

It is best to memorize the basic structure because the higher electron densities are pretty straightforward

Nadeen 3D
Posts: 21
Joined: Fri Sep 28, 2018 12:26 am

Re: Naming Shapes

Postby Nadeen 3D » Sun Nov 25, 2018 11:55 pm

Hello,
Memorizing the shapes would be ideal but also understanding when to use them. There are problems that are trying to trick you, so just really try to memorize but understand how to name them. Hope this helped.

almaochoa2D
Posts: 67
Joined: Fri Sep 28, 2018 12:23 am

Re: Naming Shapes

Postby almaochoa2D » Sun Nov 25, 2018 11:57 pm

I've just memorized the shapes it is the quickest way to name molecules which is really important for the test since you don't want to run out of time.


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