Balanced Lewis Structures

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Yazmin Bocanegra 3L
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Joined: Thu Jul 25, 2019 12:17 am

Balanced Lewis Structures

Postby Yazmin Bocanegra 3L » Thu Nov 14, 2019 6:02 pm

How can you tell which way to write a Lewis structure is the most balanced? For example, some are written with the atoms bonded vertically to the central atom, while others are written with the atoms bonded horizontally to the central atom.

Kavya Immadisetty 2B
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Re: Balanced Lewis Structures

Postby Kavya Immadisetty 2B » Thu Nov 14, 2019 6:57 pm

It doesn't really matter how you draw lewis structures (in the sense that it doesn't matter if a certain atom is attached horizontally or vertically to the central atom). Lewis structures are mainly just meant to show which atoms are bonded to which, the number of bonds between two atoms, the number of lone pairs, and formal charge. After you draw Lewis structures, you can use VSEPR to determine how the atoms are arranged geometrically.

Sukanya Mohapatra 2G
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Re: Balanced Lewis Structures

Postby Sukanya Mohapatra 2G » Sat Nov 16, 2019 4:28 pm

Generally, what matters more is that your lewis structure is stable. Typically, the structure with the most formal charges on the atoms closest to zero is the more stable Lewis structure.

Aarushi Solanki 4F
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Re: Balanced Lewis Structures

Postby Aarushi Solanki 4F » Sat Nov 16, 2019 4:32 pm

It doesn't matter if an atom is bonded vertically or horizontally to the central atom per say, but those could be the different resonance structures for the same molecule. The structure that is most stable is the one with formal charges closest to zero and the negative formal charges being on the more electronegative atoms.

TimVintsDis4L
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Re: Balanced Lewis Structures

Postby TimVintsDis4L » Sat Nov 16, 2019 5:01 pm

The drawing won't ever be quite balanced as it's a 2 dimensional version of the the shape. What matters more is the formal charge of the Lewis structure.

Cynthia Rodas 4H
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Re: Balanced Lewis Structures

Postby Cynthia Rodas 4H » Sun Nov 17, 2019 9:37 pm

You would use formal charges to determine which way to write a Lewis structure that is most stable. However, Lewis structures are 2-D and only portray which atoms are bonded together rather than in which position (such as horizontally or vertically). In order to determine it's molecular shape, you would use the VSEPR model.

jvera4b
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Re: Balanced Lewis Structures

Postby jvera4b » Sun Nov 17, 2019 9:42 pm

When drawing Lewis structure you should focus on the formal charges that make the molecule the most stable. Since Lewis structures are two-dimensional models the placement of atoms around the central atom isn't the most important aspect when drawing them.


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