# How many electrons are there in carbonate ion, #CO_3^(2-)#?

##### 1 Answer

Oct 4, 2017

#### Answer:

The carbonate dianion is

#### Explanation:

Now, clearly, the ion must contain 2 more electrons, than it does nucular charges.....in one formula unit of

And their presence is clear from the Lewis structure of carbonate anion.....there are 8 inner core electrons, i.e. formally the

And all I have done is considered the atomic numbers of each element....