Where is the charge located in a polyatomic ion?

1 Answer
May 31, 2014

Great question! I like that you are thinking this through.

The charge isn't located anywhere in particular, which is why when we draw dot-and-cross diagrams for polyatomic ions, we draw square brackets around them, and put the charge there.

![Charge of polyatomic ions from http://chemistryland.com.](http://www.chemistryland.com/CHM130W/11-Bonds/SulfateLewisDot.jpg)

Remember charge is simply an imbalance between the number of protons in the nuclei of the atoms, and the number of electrons in their shells. Each is a positive or negative charge, distributed all around the polyatomic ion in the nuclei and in the electron shells.