chemistry

posted by .

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.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    I need help in drawing a structual formula for hydrogen cyanide(HCN)and cyanogen(CN)2, the drawing has to bear in mind the valencies of hydrogen(1),nitrogen(3) and carbon (4), any help appreciated H:C:::N: :N:::C:C:::N: Check my thinking. …
  2. CHEMISTRY

    Given assumed valencies: H=1, N=3, & C=4 i am now required to draw the structural formulae of HYDROGEN CYANIDE and CYANOGEN. H:C:::N is the Lewis electron dot structure. If you want to use "sticks" as a bond instead of two electrons, …
  3. Chem

    Concerning compounds cyanogen, Hydrogen cyanide and sodium cyanide. Cyanogen = C2N2 (CN)2 Hydrogen Cyanide = HCN boils at 26C and yeilds an acid solution when added with water. Sodium Cyanide = empirical formula NaCN is a solid melts …
  4. chemistry

    I have to draw Lewis structures for hydrogen cyanide and cyanogen with nitrogen valency of three. Would I still need 2 dots after the N in hydrogen cyanide or would this represent nitrogen with a valency of 5?
  5. Chem

    Draw a Structural Formulae for Hydrogen Cyanide (HCN) and Cyanogen (C2N2 or CN2) Hydrogen = 1 Valency Nitrogen = 3 Valencies Carbon = 4 Valencies H-C(triple bond)N N(triple bond)C-C(triple bond)N Thank you And for a Lewis Structure …
  6. Chemistry

    I need some help to draw a Lewis structure for hydrogen cyanide + what is the noble gas?
  7. Chemistry

    For a lab experiment we have to draw the lewis structures of hydrides. 1) Carbon It asks for the formula of hydride. Total # of valence electrons and the lewis structure. Total electrons would be four. I am not sure what the formula …
  8. Chemistry(Please help)

    Nitrogen monoxide + Hydrogen --> nitrogen + water I need to balance this equation but I do not know how. NO + H --> N + H2O 2NO + 2H --> 2N Would this be correct?
  9. Chemistry

    Identify the true statement about Lewis structures. Select all the correct answers. 1. Hydrogen is usually surrounded by 4 electrons in a valid Lewis structure. 2. A single bond in a Lewis structure represents 2 electrons. 3. A double …
  10. Chemistry

    In a closed container 1L of chlorine reacts with 1L of nitrogen and 1L of hydrogen. I need to give lewis structure, vsepr, box notation for valence electrons etc. (i know how to do this) But I'm doubting on what the reaction equation …

More Similar Questions