Br
Then draw two dots like .. above and below its chemical symbol.
Then draw two dots like : to the left of it.
Then draw a single dot like . to the right of it.
In summary, it should be the chemical symbol, with seven dots around it in groups of two where possible. Group 7 element, so 7 valence electrons to draw.
*Can also use crosses like x and xx.
iodine w/ six electrons around it, bromine w/ six electrons around it and two electrons between them. that will maintain an octet around both atoms.
The dot structure for IBr has an I atom singly bonded to a Br atom. Each of these then has three pair of dots on the unbonded sides.
Add 3 lone pair of electrons to each Br and I atom.
: Br : Br : and both bromine atoms also have a pair of electrons both above and below them.
.. ..
Br - I - Br
Br
B:b
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
1 iodine molecule and 3 bromine molecules which make up the IBr3 atom.
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?]
I l As -I l I As has 3 valence electrons and I has 1
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.
Lewis structure for cobalt chlorit
1 iodine molecule and 3 bromine molecules which make up the IBr3 atom.