>>..
>:Cl:
>>| ..
H-C-F:
>>| ..
>:Cl:
>>..
Carbon should be the central atom sharing two electrons with H, F, Cl, and another Cl.
(ignore the >, they were used simply to keep the correct structure as spaces disappear once an answer is saved and the dot structure would appear incorrect)
each pair of dots represents 2 unshared electrons
the - between the atoms represents 2 shared electrons
Cl has 7 electrons in its valence shell, as does F
C has 4
H has 1
4+(7*3)+1=26
this gives a total of 26 electrons that should be represented in the Lewis dot structure.
in a correct Lewis Dot structure, each atom should have 8 electrons around it, save for H, of course, as this one does.
H-O-Cl
h-s=s-h
CaCO3 does not have a lewis structure because this molecule is composed of ions. (Ca+2 and CO3-2). you have to draw the lewis structure of the ions separately, as shown in the parenthesis.
I l As -I l I As has 3 valence electrons and I has 1
It is a lewis base because of its lone pair of electrons that can be "donated". If you draw/look at the lewis structure it is much easier to tell. Especially when the formula is not that of an ion!
c4h10o
H-O-Cl
h-s=s-h
dots
I uploaded a jpg of the acetate ion Lewis structure to imageshack. Just click the "related link" below and you should see it. Many people draw Lewis Structures with minor variations, but this should give you the basic idea.
Draw the Lewis Structure
Will this link help you?, it is quite impossible to draw a Lewis dot structure in this simple text editor. See related links.
See this question for how to draw the Lewis Dot structure of any molecule:[http://wiki.answers.com/Q/How_do_you_draw_Lewis_dot_structuresHow do you draw Lewis dot structures?]
CaCO3 does not have a lewis structure because this molecule is composed of ions. (Ca+2 and CO3-2). you have to draw the lewis structure of the ions separately, as shown in the parenthesis.
I l As -I l I As has 3 valence electrons and I has 1
Lewis structure for cobalt chlorit
It is a lewis base because of its lone pair of electrons that can be "donated". If you draw/look at the lewis structure it is much easier to tell. Especially when the formula is not that of an ion!