These reactions can take place in air during a thunder-storm. $\text{N}_2 + \text{O}_2 \rightarrow 2\text{NO}$ $2\text{NO} + \text{O}_2 \rightarrow 2\text{NO}_2$ $\text{NO} + \text{O}_3 \rightarrow \text{NO}_2 + \text{O}_2$ Which row indicates what happens to the reactant molecules in each reaction?