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.
What is Lewis Structure for the bicarbonate ion
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!
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.
The ion acetate is negative.
Br- ion will have 8 valence electrons. So to write the Lewis structure, write the symbol Br, with 8 dots around it. Each dot will correspond to one electron.
32
50.
1 ion
no, acetate is a polyatomic ion, not an atom.
C2H3O2- is the acetate ion.
This is the ion acetate.
Correctly written it is 'CH3COO^- ' it is a conjugate base. It is named as Ethanoate ion or Acetate ion.