Bond Lengths

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Melissa Villanueva1K
Posts: 64
Joined: Wed Nov 15, 2017 3:01 am

Bond Lengths

Postby Melissa Villanueva1K » Tue Nov 06, 2018 6:53 pm

Do we need to memorize certain bond lengths or will they just be given? And in terms of problems, how would they appear in practice problems or questions. Thanks!

Kayla Vo 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

Re: Bond Lengths

Postby Kayla Vo 1B » Tue Nov 06, 2018 7:34 pm

I believe bond lengths usually are given in the problem and when they are given, they are usually in the units pm (picometer) or A (angstroms).

Christine Chow 4G
Posts: 43
Joined: Fri Sep 28, 2018 12:28 am

Re: Bond Lengths

Postby Christine Chow 4G » Tue Nov 06, 2018 9:08 pm

I think you should generally have the idea that single bonds are longer than double bonds which are longer than triple bonds and the ionic/covalent bond trend for the periodic table. For exact numbers, I highly doubt he would have us memorize exact numbers unless he specifically tells us to.

Madison Gil 3D
Posts: 32
Joined: Fri Sep 28, 2018 12:23 am

Re: Bond Lengths

Postby Madison Gil 3D » Tue Nov 06, 2018 11:36 pm

The main things you need to know are that single bonds are longer than double bonds and double bonds are longer than triple bonds. For resonance structures, bond length will be an average of the possible bonds within the resonance structures of the molecule.

Searra Harding 4I
Posts: 68
Joined: Fri Sep 28, 2018 12:29 am

Re: Bond Lengths

Postby Searra Harding 4I » Wed Nov 07, 2018 12:40 am

I don't think you need to memorize them but you may want to know that they are generally between 100 and 200 picometers or 1-2 angstroms.

Kailey Nichols 4B
Posts: 30
Joined: Fri Sep 28, 2018 12:28 am

Re: Bond Lengths

Postby Kailey Nichols 4B » Thu Nov 08, 2018 5:12 pm

I think all you need to do is have a general understanding of bond lengths and what affects them. For example, in lecture Dr. Lavelle talked about how larger atoms have longer bond lengths (due to electron shielding etc.) and single bonds are generally longer than double bonds which are longer than triple bonds etc. So using that general knowledge, you should be able to explain why certain bonds are the lengths that they are.

Ricardo Martin 1J
Posts: 63
Joined: Fri Sep 28, 2018 12:15 am

Re: Bond Lengths

Postby Ricardo Martin 1J » Fri Nov 09, 2018 3:10 pm

I don't think you have to memorize specific bond lengths but should probably know that a single bond is longer the a double bond which is longer than a triple bond.


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