## Bond lengths

NicoJones_1B
Posts: 49
Joined: Fri Aug 09, 2019 12:16 am

### Bond lengths

If not given the particular bond length between two molecules, is there a way to find out the bond length?

DarrenKim_1H
Posts: 123
Joined: Fri Sep 20, 2019 12:17 am
Been upvoted: 1 time

### Re: Bond lengths

Not sure if you can, but when you do I believe it is the sum of the radii. Here's a link for the radii lengths of different atoms:

Mariepahos4D
Posts: 50
Joined: Sat Sep 07, 2019 12:19 am

### Re: Bond lengths

Bond lengths are accepted values that were experimentally obtained, so we would have to be given them as there is no equation to figure out a bond length

Wendy 1E
Posts: 111
Joined: Sat Aug 17, 2019 12:17 am
Been upvoted: 2 times

### Re: Bond lengths

I believe that Dr. Lavelle mentioned this once in his lectures. A bond length between two molecules is about 10^-10m, which is equal to 1 Angstrom.

abby hyman
Posts: 31
Joined: Thu Jul 25, 2019 12:16 am

### Re: Bond lengths

Wendy Perez 3A wrote:I believe that Dr. Lavelle mentioned this once in his lectures. A bond length between two molecules is about 10^-10m, which is equal to 1 Angstrom.

Yes, this is correct. A bond length is always equal to 1 angstrom

Maia_Jackson_2C
Posts: 101
Joined: Fri Aug 30, 2019 12:17 am

### Re: Bond lengths

Then if the bond length is always the same why is it important?

Claire Grover 3G
Posts: 64
Joined: Wed Sep 18, 2019 12:18 am

### Re: Bond lengths

I believe we would be given this!

Debora Fernandez Clemente_ 4H
Posts: 52
Joined: Wed Sep 18, 2019 12:21 am

### Re: Bond lengths

would the bond length vary when it is a double or triple bond?

andrewcj 2C
Posts: 102
Joined: Thu Jul 11, 2019 12:17 am

### Re: Bond lengths

Debora Fernandez Clemente_ 4H wrote:would the bond length vary when it is a double or triple bond?

Yes! Multiple bonds will be shorter than single bonds.

Kelvin Chung 1C
Posts: 50
Joined: Sat Aug 24, 2019 12:15 am

### Re: Bond lengths

andrewcj 4I wrote:
Debora Fernandez Clemente_ 4H wrote:would the bond length vary when it is a double or triple bond?

Yes! Multiple bonds will be shorter than single bonds.

For example, because a double bond is stronger than a single bond, the double bond's length will be relatively shorter since the atoms are pulled together with more strength.

Destiny_Ryales_3J
Posts: 38
Joined: Fri Sep 28, 2018 12:28 am

### Re: Bond lengths

How could there be any variance in bond length if it’s always one angstrom?

005162902
Posts: 102
Joined: Wed Sep 18, 2019 12:15 am

### Re: Bond lengths

Bond lengths equal one Angstrom, and will lively be given. However, double bonds will be shorter than single bonds a lot of the time because they have a stronger pull between molecules, likely pulling them closer together and requiring a shorter bond.

Katie Bart 1I
Posts: 104
Joined: Sat Aug 24, 2019 12:16 am

### Re: Bond lengths

Are double bonds always shorter than single bonds? Are there any exceptions?

Maya Pakulski 1D
Posts: 105
Joined: Thu Jul 11, 2019 12:17 am

### Re: Bond lengths

Are bond lengths different for each molecule or are they always the same length?

VioletKo3F
Posts: 103
Joined: Sat Sep 07, 2019 12:18 am

### Re: Bond lengths

Does anyone know that actual length of double and triple bonds? Will we need to know this on the tests?

Omar Selim 1D
Posts: 108
Joined: Sat Jul 20, 2019 12:16 am

### Re: Bond lengths

There's no formula but there are very specific lengths for certain bonds that I doubt will be expected knowledge to know on the test