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Bond length

Posted: Sat Jun 09, 2018 1:31 pm
by Maria Roman 1A
How can you tell when an atom has a longer bond?

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

Re: Bond length

Posted: Sat Jun 09, 2018 2:26 pm
by Brynne Keyser 1B
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.

Re: Bond length

Posted: Sat Jun 09, 2018 5:40 pm
by Paywand Baghal
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?

Re: Bond length

Posted: Sat Jun 09, 2018 6:34 pm
by Ignacio Ramirez 1J
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.

Re: Bond length

Posted: Sat Jun 09, 2018 7:10 pm
by Aryana Nazem 1A
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

Re: Bond length

Posted: Mon Jun 11, 2018 12:53 am
by Yitzchak Jacobson 1F
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 :)