Partial Charges

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Shrita Pendekanti 4B
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Partial Charges

Postby Shrita Pendekanti 4B » Fri Feb 26, 2016 11:45 pm

Can someone please clarify how we know when atoms in a molecule should have partial charges? Thanks!

Chem_Mod
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Re: Partial Charges

Postby Chem_Mod » Fri Feb 26, 2016 11:51 pm

You should look at their electronegativity and think how electron favors one over the other.

Shrita Pendekanti 4B
Posts: 22
Joined: Fri Sep 25, 2015 3:00 am

Re: Partial Charges

Postby Shrita Pendekanti 4B » Fri Feb 26, 2016 11:53 pm

Ok, so if they are close in electronegativity, then the electrons will be more shared, giving the atoms partial rather than complete charges?

Cat Larcheveque 2E
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Re: Partial Charges

Postby Cat Larcheveque 2E » Sat Feb 27, 2016 12:07 am

Not quite? The atoms in a molecule are bonded together and share electrons. However, sometimes one atom has a higher electronegativity, and thus, pulls the electrons closer to itself. Because the electron is closer to it, that atom has a partial negative charge. On the other hand, the atom whose electron is being pulled away partially loses the negative charge of the electron. This atom now has a partial positive charge.

Shrita Pendekanti 4B
Posts: 22
Joined: Fri Sep 25, 2015 3:00 am

Re: Partial Charges

Postby Shrita Pendekanti 4B » Mon Feb 29, 2016 6:46 pm

Oh ok, so then a greater difference in electronegativity would cause partial charges?


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