Question

The total number of electrons in one molecule of carbon dioxide is :

• A. 22
• B. 44
• C. 66
• D. 88

Answer 1

Answer: (A)

22

The atomic numbers of carbon and oxygen are $6$ and $8$ respectively. Thus, they contain $6$ and $8$ electrons respectively.
The number of total electrons present in one molecule of $C{O}_2$ $=$ electrons present in one carbon atom $+2\times$electrons present in one oxygen atom $=6+2\times 8=22$