Question

how many electrons in co2​

Answer 1

One molecule of CO2 contains one atom of carbon and two atoms of oxygen. Each C atom contains 6 electrons. Each Oxygen atom contains 8 electrons. So, the total number of electrons in one molecule of CO2 are 6+2(8)=22.

Answer 2

For determining the number of electrons, we have to keep in mind that it is a $\bold{ Covalent\:bond}$.

➡ Number of electrons:

16