Monday
December 22, 2014

Homework Help: chemistry

Posted by Hol on Thursday, March 8, 2007 at 9:22am.

I'm drawing a Lewis structure for hydrogen cyanide using nitrogen with a valency of 3. Would I still need 2 dots after the N or would this represent nitrogen valency 5?

You need the two extra electrons for N at the end. Only the electrons involved BETWEEN the elements are bonding electrons; the others are used to fill orbtials but not for bonding purposes. Here is how you determine it.
H has 1 electron in the outer shell.
C Has 4 electrons in the outer shell.
N has 5 electrons in the outer shell.

10 electrons total. So ALL 10 electrons must be used. AND you try to place them such that two electrons are in the H sphere and 8 electrons for the other two elements.
H:C:::N:
The terminal (unpaired) electrons on N are used to make 8 electrons for N but those two are not involved in bonding. You see H has 1 bond, C has 4, and N has 3 (two dots, that is electrons) are equivalent to one (-) bond or 4 electrons are equivalent to a double (=) bond or 6 electrons are equivalent to a triple bond (but I can't draw a triple bond on the computer.

Answer this Question

First Name:
School Subject:
Answer:

Related Questions

chemistry - I have to draw Lewis structures for hydrogen cyanide and cyanogen ...
chemistry - I need help in drawing a structual formula for hydrogen cyanide(HCN)...
Chem - Concerning compounds cyanogen, Hydrogen cyanide and sodium cyanide. ...
Chemistry - Ammonia is composed of hydrogen and nitrogen in a ratio of 9.33 g of...
Chemistry(Please help) - Nitrogen monoxide + Hydrogen --> nitrogen + water I ...
Science question, only 1 - What would be the consequence of an ecosystem that ...
Chem - Concerning compounds cyanogen, Hydrogen cyanide and sodium cyanide. ...
CHEMISTRY - Given assumed valencies: H=1, N=3, & C=4 i am now required to draw ...
Chemistry - I need some help to draw a Lewis structure for hydrogen cyanide + ...
Chemistry - For a lab experiment we have to draw the lewis structures of ...

Search
Members