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

1 Answer
Oct 4, 2017

Answer:

The carbonate dianion is #CO_3^(2-)#

Explanation:

Now, clearly, the ion must contain 2 more electrons, than it does nucular charges.....in one formula unit of #CO_3^(2-)# there are #6_C+3xx8_O=30*"positively charged nuclear particles"#. And thus there MUST be 32 electrons conceived to whizz about the nuclei.

And their presence is clear from the Lewis structure of carbonate anion.....there are 8 inner core electrons, i.e. formally the #1s^2# electrons, and for #O=C(-O^(-))_2# there 24 electrons (i.e. 12 electron pairs) involved in bonding or present as lone pairs. Thirty-two electrons as required.

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