What are the two forms of oxygen found in the atmosphere?

Explanation

**Step-by-Step Solution:**

1. **Understanding Oxygen in the Atmosphere**: Oxygen exists in different forms in the atmosphere. The question specifically asks for the two forms.

2. **Identifying the First Form**: The first form of oxygen is diatomic oxygen, which is represented as O2. This is the form of oxygen that we commonly breathe in. It is essential for the survival of many organisms, including humans.

3. **Identifying the Second Form**: The second form of oxygen is triatomic oxygen, known as ozone, represented as O3. Ozone is found in the stratosphere and plays a crucial role in protecting the Earth from harmful ultraviolet (UV) rays.

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