In the Reactions Involved in the Photodecomposition of Ozone (Shown

Multiple Choice

In the reactions involved in the photodecomposition of ozone (shown below) , what does M symbolize?
1) O₂ (g) + hv → O (g) + O (g)
2) O (g) + O₂ (g) + M (g) →O₃ (g) + M^* (g)
3) O₃ (g) + hv →O₂ (g) + O (g)
4) O (g) + O (g) + M (g) →O₂ (g) + M^* (g)

A) mesosphere
B) methane
C) molybdenum
D) metal
E) molecule