Ionic vs covalent

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Gwynneth Orlino 1B
Posts: 26
Joined: Wed Nov 21, 2018 12:18 am

Ionic vs covalent

Postby Gwynneth Orlino 1B » Mon Jul 29, 2019 1:44 pm

How can I determine if a compound has ionic or covalent bonds?

Jennifer Zhou 1A
Posts: 31
Joined: Mon Jun 17, 2019 7:23 am

Re: Ionic vs covalent

Postby Jennifer Zhou 1A » Mon Jul 29, 2019 2:47 pm

if the electronegativity difference is greater than 2, it has ionic bond
if the electronegativity difference is less than 1.5, it has covalent bond

Chris Charton 1F
Posts: 19
Joined: Mon Jun 17, 2019 7:23 am

Re: Ionic vs covalent

Postby Chris Charton 1F » Mon Jul 29, 2019 11:28 pm

If the difference is between 1.5 and 2 does the bond exhibit qualities of both ionic and covalent bonds?

Yasmin Olvera 1D
Posts: 29
Joined: Thu Feb 14, 2019 12:15 am

Re: Ionic vs covalent

Postby Yasmin Olvera 1D » Tue Jul 30, 2019 12:12 pm

Jennifer Zhou 1A wrote:if the electronegativity difference is greater than 2, it has ionic bond
if the electronegativity difference is less than 1.5, it has covalent bond


How would we go about calculating electronegativity?

Chem_Mod
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Re: Ionic vs covalent

Postby Chem_Mod » Tue Jul 30, 2019 12:33 pm

You determine if a compound has ionic or covalent bonds by examining the electronegativity differences between atoms. You will not need to do calculations for electronegativity. If the electronegativity difference between two atoms is greater than 2, then an ionic bond will form (ex. salts like NaCl). If the electronegativity difference is less than 1.5, then a covalent bond will form. Polar covalent bonds are bonds between elements with different electronegativites but those that aren't large enough that we would call the bond ionic. Therefore, electronegativity differences between 1.5 and 2 can be thought of as polar covalent bonds.

Jennifer Zhou 1A
Posts: 31
Joined: Mon Jun 17, 2019 7:23 am

Re: Ionic vs covalent

Postby Jennifer Zhou 1A » Tue Jul 30, 2019 2:50 pm

Yasmin Olvera 1D wrote:
Jennifer Zhou 1A wrote:if the electronegativity difference is greater than 2, it has ionic bond
if the electronegativity difference is less than 1.5, it has covalent bond


How would we go about calculating electronegativity?


there is an electronegativity chart if you google it, but we don't have to memorize all of them. but I think we should know that F is the most electronegative, the trend of electronegativity ( more electronegative towards the top right corner of the periodic table), metal usually form ionic bond with non-metal, etc.


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