# Which particle diagram represents a sample containing the compound CO_2? How do you determine this?

Dec 30, 2016

(4) is eliminated immediately. Why? Which of (1), (2), and (3) best represents $C {O}_{2}$, or $O = C = O$, which of course is a better representation of the molecule?
I think (I) is the clear choice. (2) might represent a homonuclear, diatomic molecule such as ${N}_{2}$ or ${O}_{2}$. And (3) might represent $N O$ or $C O$. Do you agree with these assignments?
Given the representations in the diagrams, how would you represent the (bent) molecules $N {O}_{2}$ or $S {O}_{2}$?