Bond length

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Maria Roman 1A
Posts: 30
Joined: Fri Apr 06, 2018 11:04 am

Bond length

Postby Maria Roman 1A » Sat Jun 09, 2018 1:31 pm

How can you tell when an atom has a longer bond?

an example: F, F^2-, F^2+

Brynne Keyser 1B
Posts: 31
Joined: Fri Apr 06, 2018 11:03 am

Re: Bond length

Postby Brynne Keyser 1B » Sat Jun 09, 2018 2:26 pm

You can look at the number of electrons that are present in each molecule. If there are more lone pairs, they will repel each other and cause a longer bond to be formed.

Paywand Baghal
Posts: 32
Joined: Fri Apr 06, 2018 11:01 am

Re: Bond length

Postby Paywand Baghal » Sat Jun 09, 2018 5:40 pm

Brynne Keyser 1B wrote:You can look at the number of electrons that are present in each molecule. If there are more lone pairs, they will repel each other and cause a longer bond to be formed.


So for F when more electrons are added, it makes the bond longer?

Ignacio Ramirez 1J
Posts: 31
Joined: Tue Nov 14, 2017 3:02 am

Re: Bond length

Postby Ignacio Ramirez 1J » Sat Jun 09, 2018 6:34 pm

Draw the Lewis structure, look up the chart below for the radii for the corresponding bond, and find the sum of the two radii. Because the bond length is proportional to the atomic radius, the bond length trends in the periodic table follow the same trends as atomic radii: bond length decreases across a period and increases down a group.

Aryana Nazem 1A
Posts: 40
Joined: Fri Apr 06, 2018 11:04 am

Re: Bond length

Postby Aryana Nazem 1A » Sat Jun 09, 2018 7:10 pm

Paywand Baghal wrote:
Brynne Keyser 1B wrote:You can look at the number of electrons that are present in each molecule. If there are more lone pairs, they will repel each other and cause a longer bond to be formed.


So for F when more electrons are added, it makes the bond longer?


Yes in this case because you are adding more electrons and therefore a lone pair

Yitzchak Jacobson 1F
Posts: 31
Joined: Wed Nov 22, 2017 3:00 am

Re: Bond length

Postby Yitzchak Jacobson 1F » Mon Jun 11, 2018 12:53 am

I believe you can tell which atom has a longer bond length by looking at how many electrons are present within the atoms.
I hope this answers your question :)


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