General Molecular Shape

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

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Bree Perkins 1E
Posts: 34
Joined: Fri Apr 06, 2018 11:04 am

General Molecular Shape

Postby Bree Perkins 1E » Tue May 29, 2018 12:58 pm

Hi,
How do tell what the molecular shape of the molecule is? What is the criteria for distinguishing it?

Solene Poulhazan
Posts: 19
Joined: Fri Apr 06, 2018 11:04 am

Re: General Molecular Shape

Postby Solene Poulhazan » Tue May 29, 2018 3:26 pm

You can look at the number of electron groups and the number of bonding groups (and lone pairs). This will help you identify the molecular shape.

Gianna Graziano 1A
Posts: 36
Joined: Wed Apr 04, 2018 3:00 am

Re: General Molecular Shape

Postby Gianna Graziano 1A » Tue May 29, 2018 9:08 pm

Hi Bree,
You can first look at the number of "things" bonded to the central atom, these can be lone pairs or bonded electrons. The number of lone pairs that the central atom has, combined with the number of "bonds" determines the shape. For example, if there are 0 LP and 2 "bonds", the shape will be linear.

Alexandra Wade 1L
Posts: 32
Joined: Fri Apr 06, 2018 11:05 am
Been upvoted: 1 time

Re: General Molecular Shape

Postby Alexandra Wade 1L » Wed May 30, 2018 11:19 am

The best thing you can do is start familiarizing yourself with the general formula and associating each individual formula with its name. For example, AX4E is a seesaw shape, therefore every molecule with 4 bonding pairs and one lone pair on a central atom will have a seesaw shape.


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