Question

find the number of electrons in 240u mass of CO32- ions​

Answer 1

Answer:

Explanation:

The carbonate dianion is  

C

O

2

−

3

Explanation:

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

C

O

2

−

3

there are  

6

C

+

3

×

8

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  

1

s

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.