Order of Dots

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JooHyun Koh 1H
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Joined: Fri Apr 06, 2018 11:03 am

Order of Dots

Postby JooHyun Koh 1H » Mon May 07, 2018 11:32 pm

I remember there being a specific order in which we have to draw the dots (that represents valence electrons) around the element, but I have forgotten. Can someone explain to me the order?

204917020
Posts: 31
Joined: Fri Apr 06, 2018 11:05 am

Re: Order of Dots

Postby 204917020 » Tue May 08, 2018 1:04 am

I'm not sure I understand your question, but to start, count the valence electrons for each atom in the compound.
Next, choose the atom with the lowest ionization energy and this will be the element in the center of the lewis structure. From there, arrange the remaining atoms symmetrically around the center and add electrons or bonds according to the octet rule (or the duet rule in the case of Hydrogen).

Jennifer Ma 1G
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Re: Order of Dots

Postby Jennifer Ma 1G » Tue May 08, 2018 10:11 am

I don't think that you have to fill the valence electrons in a specific order, all you need to do is make sure you're filling them in symmetrically. For example, if you had a molecule that had the following structure ( E - H - E ), and you had 8 valence electrons to fill, you would do have to fill 4 on the left and 4 on the right, not 6 on the left, and only 2 on the right.

Paywand Baghal
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Joined: Fri Apr 06, 2018 11:01 am

Re: Order of Dots

Postby Paywand Baghal » Tue May 08, 2018 10:27 am

Jennifer Ma 1G wrote:I don't think that you have to fill the valence electrons in a specific order, all you need to do is make sure you're filling them in symmetrically. For example, if you had a molecule that had the following structure ( E - H - E ), and you had 8 valence electrons to fill, you would do have to fill 4 on the left and 4 on the right, not 6 on the left, and only 2 on the right.


but you would fill it out until all the elements have reached an octet? except for H, He, Li, and Be

Alondra Juarez section 1E
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Joined: Fri Sep 29, 2017 7:03 am

Re: Order of Dots

Postby Alondra Juarez section 1E » Sun May 13, 2018 11:33 am

I believe they have to be balanced but it all corresponds to the number of electrons that element has

Kate Manganaro 1F
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Re: Order of Dots

Postby Kate Manganaro 1F » Sun May 13, 2018 7:29 pm

There's no particular order you just have to make sure that the electrons are balanced and that you use all of the valence electrons and additional electrons that you get from the problem.

Rummel Requerme 1E
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Re: Order of Dots

Postby Rummel Requerme 1E » Sun May 13, 2018 8:24 pm

There isn't a specific way to draw the dots. I thought so myself, but it's best to just draw them out (in no particular order) and see which are unpaired /paired! From there, you can determine what bonds to draw.

Caitlyn Ponce 1L
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Re: Order of Dots

Postby Caitlyn Ponce 1L » Sun May 13, 2018 8:39 pm

During last week's discussion, my TA said that there's not really a specific way to fill electrons in Lewis structures.

Surya Palavali 1D
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Re: Order of Dots

Postby Surya Palavali 1D » Sun May 13, 2018 8:55 pm

Pretty sure there is not a specific order for the dots.

Myles Chang 1B
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Joined: Fri Apr 06, 2018 11:02 am

Re: Order of Dots

Postby Myles Chang 1B » Sun May 13, 2018 9:24 pm

There is no specific order that you need to fill in the dots. The only thing you need to be wary of is that Hund's rule needs to be applied. This means that you shouldn't have two electrons in one orbital (one side of the element), while another has zero.

SamanthaGrohe1B
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Joined: Fri Apr 06, 2018 11:03 am

Re: Order of Dots

Postby SamanthaGrohe1B » Sun May 13, 2018 11:19 pm

there is no specific order needed when filling in the dots representing the outer unshared valence electrons of an element within a molecule or compound. the number of electrons per element is much more important that the order in which they are drawn in so just remember the octet rule and Hund's rule when doing so.

Jennifer Ma 1G
Posts: 31
Joined: Fri Apr 06, 2018 11:03 am

Re: Order of Dots

Postby Jennifer Ma 1G » Tue May 15, 2018 5:30 pm

Paywand Baghal wrote:
Jennifer Ma 1G wrote:I don't think that you have to fill the valence electrons in a specific order, all you need to do is make sure you're filling them in symmetrically. For example, if you had a molecule that had the following structure ( E - H - E ), and you had 8 valence electrons to fill, you would do have to fill 4 on the left and 4 on the right, not 6 on the left, and only 2 on the right.


but you would fill it out until all the elements have reached an octet? except for H, He, Li, and Be


If you have enough electrons that allow you to fill the octet, then yes!


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