How does ozone (O3) differ from normal oxygen (O2)?

• A. Ozone is more stable than oxygen
• B. Ozone consists of three oxygen atoms, making it less stable
• C. Ozone contains no oxygen atoms
• D. Ozone is heavier than oxygen

Answer: (B)

Ozone differs from normal oxygen primarily in its molecular structure. Ozone consists of three oxygen atoms (O3), whereas normal oxygen is made up of two oxygen atoms (O2). This additional oxygen atom in ozone makes it less stable than the molecular form of normal oxygen. Ozone is known for being a powerful oxidizing agent, and it readily reacts with other substances, which is indicative of its lesser stability compared to diatomic oxygen.

Ozone plays a critical role in the Earth's atmosphere, particularly in the ozone layer, where it helps absorb harmful ultraviolet radiation. However, its instability also means that it can decompose back into oxygen relatively quickly under certain conditions, contributing to different environmental and health impacts than those associated with stable oxygen.

This instability of ozone reinforces its role in atmospheric chemistry and its importance in both environmental processes and regulatory discussions surrounding air quality and pollution control.