Hi all, I'm just trying to work on some test review problems, and I'm a little confused about what they're asking.

Here are the instructions: Give the electron-domain and molecular geometries for the following molecules and ions.

It gives you the choices of:

Bent

Linear

Octahedral

Seesaw

Square planar

Square pyramidal

Tetrahedral

Trigonal planar

Trigonal pyramidal

Trigonal bipyramidal

**I don't understand how to find the electron domain, or what that's talking about. I'm pretty sure I have the molecular geometry down, but correct me if I'm wrong.**CO32-

electron domain: ?

molecular geometry: trigonal planar

TeF4

electron domain:

molecular geometry: trigonal bipyramidal

NH3

electron domain:?

molecular geometry: trigonal pyramidal

SeCl2

electron domain: ?

molecular geometry: seesaw

XeF4

electron domain:?

molecular geometry: square planar

SF6

electron domain:?

molecular geometry: octahedral

THANK YOU IN ADVANCE!