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

Answer 2

In a neutral atom, atomic number represents the number of
protons inside the nucleus and equal number of electrons around
it. Therefore, the number of total electrons in molecule of $CO_2$
\hspace10mm = electrons present in one carbon atom
+ 2 x electrons present in one oxygen atom = 6 + 2 x 8 = 22.