Jump to content


Photo
- - - - -

Draw Bohr diagrams for covalent compounds?


  • Please log in to reply
2 replies to this topic

#1 kingwinner

kingwinner

    Questioning

  • Members
  • 227 posts

Posted 09 November 2005 - 03:01 PM

I am really frustrated when my instrctor didn't accept what I was taught to draw Bohr diagrams showing the sharing of electrons. I was taguht that since grade 9 just to circle the elctrons being shared, while my instructor requires the orbits to overlap each other. Maybe what I was taguht for all these years are wrong :friday: Anyway I must follow and accept the "new" method!

An example of a covalent compound is H2O, its correct Bohr diagram is:
Posted Image
To show the "sharing" of electrons. The second energy level circle of O intersects the first energy level circles of H.

But how can I draw the Bohr diagram for N2 and CO2?

I attempted to draw the Bohr diagram for the covalent compound N2 but failed to do so.

The second one of the diagram below is my usual method of showing sharing, now I must do it like the H2O example shown above (i.e. without drawing circles) Can someone please help? I seriously don't understand how I can show sharing of electrons by making the orbits of 2 atoms to intersect........"6" electrons are involved in the sharing...there is no way to join the orbits together and show how the 6 electrons are shared...

Posted Image

Can somone please teach me how to draw Bohr diagrams for the covalent compounds?

#2 Jay-qu

Jay-qu

    Ancora Imparo

  • Moderators
  • 6,338 posts

Posted 09 November 2005 - 04:50 PM

I can only show you how I was tought and like you said you where taught differently - of corse there is going to be different conventions throught different learning institutions, so im not going to pretend to be correct.

my drawings although crude and rushed, shows that the 2 N atoms are sharing 3 pairs of electrons, which i placed in the overlap, same with the CO2 but this time all the C valence electrons are shared - the other electron pairs I place opposite because of electro-static repulsion, which is a convention that my teacher showed me but doesnt really make sense if you consider quantum mechanics... but there you go :friday:

#3 kingwinner

kingwinner

    Questioning

  • Members
  • 227 posts

Posted 09 November 2005 - 10:16 PM

I have seen web sites doing it this way:
Posted Image
Is this correct, in terms of showing the sharing of electrons? (despite the fact that they only show the valence energy level)