Bond Strength

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Alex Tchekanov Dis 2k
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Joined: Sat Aug 24, 2019 12:16 am

Bond Strength

Postby Alex Tchekanov Dis 2k » Sat Nov 02, 2019 11:36 pm

Can someone please explain why the C-F bond is stronger than the C-Cl bond? Is it because of electronegativity?

Posts: 103
Joined: Sat Sep 14, 2019 12:16 am

Re: Bond Strength

Postby 805422680 » Sun Nov 03, 2019 12:09 am

It is because of the size of the fluoride and chloride ion too. The fluoride ion is smaller than the chloride ion as size of an ion increases down a group. Therefore, the electrons are held more closely and hence, the bond is stronger.

Shutong Hou_1F
Posts: 117
Joined: Sat Sep 14, 2019 12:17 am

Re: Bond Strength

Postby Shutong Hou_1F » Sun Nov 03, 2019 12:19 am

Indeed, F has greater electronegativity than Cl. I think it is because of greater electronegativity, electrons are pulled to F by a greater electrostatic force than to Cl.

Jorja De Jesus 2C
Posts: 121
Joined: Sat Jul 20, 2019 12:15 am

Re: Bond Strength

Postby Jorja De Jesus 2C » Sun Nov 03, 2019 12:20 am

It is mainly referring to the size of the atom. The larger the atom the larger the bonds, and the larger the bonds the weaker the bonds are. The smaller the atom the shorter the bonds, and the shorter the bonds the stronger the bonds are. So basically you just have to look at the atomic radius trend. The atomic radius decreases as you go left to right on the periodic table and increases as you go top to bottom. Fluorine is above Chlorine so it has a smaller atomic radius than Chlorine. Because it is smaller it will also have a shorter bond with another element. So Fluorine's bond with Carbon will be shorter and stronger than Chlorine's bond with Carbon.

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