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Lewis Structures

Posted: Sun Oct 16, 2016 7:14 pm
by JosephLew3C
On page 80 of the course reader it shows that a single bond length is 1.40 angstroms and that a double bond length is 1.20 angstroms, but it doesn't state the length of a triple bond does anyone know the exact measurement?

Re: Lewis Structures

Posted: Sun Oct 16, 2016 7:29 pm
by Ryan Petrecca 1L
I don't know the exact length of a triple bond, but it's not that important to know the exact length of single, double, and triple bonds as these lengths vary between molecules. What is important is that bond length decreases as it goes from single>double>triple.

Re: Lewis Structures

Posted: Wed Oct 19, 2016 11:02 pm
by Joslyn_Santana_2B
Hi, Does anyone know why for Xenon (Xe) can break the octet guideline?

I wrote out the electron configuration for it thinking it would help me see it visually, but all the d,s, and p orbitals are full. I am not seeing why it can break the octet rule.

Re: Lewis Structures

Posted: Wed Oct 19, 2016 11:16 pm
by Joslyn_Santana_2B
Here is an example of Xe breaking the octet rule.

Re: Lewis Structures

Posted: Fri Oct 21, 2016 10:33 am
by Jazmin Martin 1D
Hey guys,
How do we know when an element goes in the middle of the Lewis structure. Does it have to do with the ionization energy? For example, ONF. Or any combination of three elements.
Thank you,
Jazmin

Re: Lewis Structures

Posted: Fri Oct 21, 2016 12:23 pm
by Tatum_Bernat_1E
Regarding Jasmin's question... Page 79 of the course reader instructs us to choose the atom with the lowest ionization energy as the central atom. The nitrogen in ammonium would be the central atom, because of its low ionization energy compared to hydrogen's. (Not to mention hydrogen is never the central atom)
-Tatum

Re: Lewis Structures

Posted: Fri Oct 21, 2016 12:39 pm
by Shirley_Zhang 3O
Joslyn_Santana_3A wrote:Here is an example of Xe breaking the octet rule.


Yes, you are right that both the S and P orbitals are filled, but Xe also has 5d orbitals that is shown in period 6 on the periodic table, so the extra pairs of bonds occupy the d-orbitals