What is the molecular symbol for ozone?

The molecular symbol for ozone is represented by O3. Ozone is a triatomic molecule composed of three oxygen atoms bonded together. This specific arrangement of atoms is what distinguishes ozone from diatomic oxygen (O2), which consists of only two oxygen atoms.

Ozone plays a crucial role in the atmosphere, particularly in the stratosphere, where it forms a layer that protects living organisms from harmful ultraviolet radiation from the sun. The unique structure of the O3 molecule allows it to absorb UV light, preventing it from reaching the Earth's surface.

The other options (O2, O4, and O5) refer to different forms of oxygen or hypothetical molecules that do not exist in a stable state or do not represent ozone. Thus, the correct answer accurately reflects the distinct triatomic nature of ozone.