# What is the charge on a carbonate ion #(CO_3)##2-#?Compared to the number of protons, how many electrons does the carbonate ion have?

##### 1 Answer

The carbonate dianion MUST have 2 more electrons than it does nuclear protons. Let's see if it does.

#### Explanation:

The number of nuclear protons are the number of positively charged particles contained in atomic nuclei.

So how many electrons on carbonate? There are 6 from carbon, 24 from oxygen, PLUS 2 extra negatively charged particles from the formal charge on the anion. 32 electronic charges (

Of course this assignment of charge is a formalism; and we would distribute the charge over the oxygen centres by resonance.