Ionic Character

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Tessa Lawler 1A
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Joined: Fri Sep 28, 2018 12:18 am

Ionic Character

Postby Tessa Lawler 1A » Wed Nov 28, 2018 4:06 pm

In the textbook, there's a question that says "In which of the following compounds do the bonds have greater ionic character? a)P4O10 b)PCl3". The answer is A. I know that ionic character is determined by the difference in the atoms' electronegativity, but since P seems an equal distance from Cl and O on the periodic table, how do you determine which is more electronegative than P?

MichelleRamirez_2F
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Joined: Fri Sep 28, 2018 12:28 am

Re: Ionic Character

Postby MichelleRamirez_2F » Wed Nov 28, 2018 4:20 pm

Electronegativity decreases down a group since Cl is lower than O, I want to.say that O is more electronegative than Cl.

Sophia Ding 1B
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Joined: Fri Sep 28, 2018 12:16 am

Re: Ionic Character

Postby Sophia Ding 1B » Tue Dec 04, 2018 6:15 pm

Yeah there is no "definite" trend to electronegativity like there is for trends of atomic radius (and others we learned), but in my head I like to remember that F is the most electronegative element, and then next one would be O. So I guess going down a group results in a lower electronegativity generally, thus Cl has less electronegativity than O thus having less ionic character as PCl3.

Mark 1D
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Re: Ionic Character

Postby Mark 1D » Fri Dec 07, 2018 8:23 pm

I believe oxygen is more electronegative as it is higher than chlorine on the periodic table

305117729
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Re: Ionic Character

Postby 305117729 » Fri Dec 07, 2018 9:54 pm

Generally, the greater the difference between two atoms forming the ion, the greater ionic character this ion will show

Joaquin Andrade
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Joined: Fri Sep 28, 2018 12:27 am

Re: Ionic Character

Postby Joaquin Andrade » Fri Dec 07, 2018 11:09 pm

Oxygen is actually more electronegative since Cl is a period down and thus is affected by shielding. This can be verified in the actual electronegativity values for O and Cl.

Daniel Kim 1D
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Joined: Wed Oct 03, 2018 12:17 am

Re: Ionic Character

Postby Daniel Kim 1D » Sun Jul 28, 2019 9:12 pm

Because Cl is affected by shielding, O is actually higher in electronegativity. Also, oxygen is considered one of the most electronegative alongside, Nitrogen and Fluorine which is why H Bonding only happens between those three elements.

Radha Patel 1A
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Re: Ionic Character

Postby Radha Patel 1A » Sun Jul 28, 2019 11:28 pm

Oxygen is more electronegative than Cl because electronegativity decreases down the columns and increases across. Thus, O is more electronegative than P


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