Steps to drawing a structure

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Nikita Patra 3J
Posts: 50
Joined: Sat Jul 20, 2019 12:16 am

Steps to drawing a structure

Postby Nikita Patra 3J » Fri Oct 25, 2019 4:57 pm

Why does the least electronegative atom belong in the the center when drawing the structures?

605379296
Posts: 58
Joined: Sat Aug 17, 2019 12:16 am

Re: Steps to drawing a structure

Postby 605379296 » Fri Oct 25, 2019 5:10 pm

This is because the least electronegative element is able to share more electrons when compared to a more electronegative element. This also may be because less electronegative atoms tend to have a lower number of electrons in the valence shell, so it is easier to add more electrons into its valence shell.

Julia Mazzucato 4D
Posts: 64
Joined: Fri Aug 30, 2019 12:17 am

Re: Steps to drawing a structure

Postby Julia Mazzucato 4D » Fri Oct 25, 2019 5:16 pm

I second the above answer. The exception is hydrogen, of course. You never put hydrogen at the center of the molecule when drawing a dot structure.

Jason Wu 1E
Posts: 101
Joined: Thu Jul 25, 2019 12:15 am

Re: Steps to drawing a structure

Postby Jason Wu 1E » Fri Oct 25, 2019 5:17 pm

I believe that the reason the least electronegative atom is in the center of an atom because the element in the center of the atom have to share electrons with all the other surrounding elements. By having the least electronegative atom in the center allows for a more stable bond between the elements because the center atom will be more prone to share the electrons within a covalent bond. However, the least electronegative atom is not always in the center as H2O has Oxygen in the center of the atom. This is because Hydrogen is only capable of forming one bond and thus could not be the center atom.

Anokhi Patel 2B
Posts: 76
Joined: Fri Aug 09, 2019 12:17 am

Re: Steps to drawing a structure

Postby Anokhi Patel 2B » Sat Oct 26, 2019 3:19 pm

Yes, the least electromagnetic atom must be able to hold the bonds with the other elements, therefore its placement in the center strengthens the entire compound.

Andrew F 2L
Posts: 103
Joined: Sat Aug 17, 2019 12:17 am

Re: Steps to drawing a structure

Postby Andrew F 2L » Sat Oct 26, 2019 4:11 pm

Adding on to what others have said about having the least electronegative atom in the middle, I believe I heard Lavelle saying that many of the compounds that are created from the bonds have Hydrogen in them and Hydrogen atoms are nearly always at the very ends of the Lewis structure.


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