O2 refers to a molecule of oxygen, which consists of two oxygen atoms bonded together. On the periodic table, oxygen is represented by the symbol O and has an atomic number of 8. This means that each oxygen atom has 8 protons in its nucleus.
Oxygen is a highly reactive non-metal and is essential for life. It is the third most abundant element in the universe and makes up about 21% of the Earth’s atmosphere. In its molecular form (O2), oxygen is a colorless, odorless gas that is crucial for respiration in most living organisms.
Here are some key points about O2:
- Chemical Formula: O2
- Atomic Number: 8
- State at Room Temperature: Gas
- Importance: Essential for respiration and combustion
In summary, O2 is the molecular form of oxygen, a vital element for life and many chemical processes.