Oxygen

Oxygen is a chemical element with the symbol O and atomic number 8. It is a highly reactive nonmetal and an essential component of air, water, and many organic compounds. Oxygen is critical for life as it is involved in the process of respiration, which provides energy to living organisms.

Properties of Oxygen:

• Atomic Number: 8
• Atomic Mass: 15.999 u
• Physical State at Room Temperature: Gas
• Color: Colorless
• Odor: Odorless
• Boiling Point: -183°C
• Freezing Point: -218.8°C

Uses of Oxygen:

Oxygen has various important uses, including:

• Supporting respiration in living organisms
• Industrial purposes, such as in steel production and water treatment
• Medical applications, such as in oxygen therapy and life support systems
• Rocket propulsion and aerospace applications

Oxygen in the Environment:

Oxygen makes up about 21% of the Earth's atmosphere and is a key component of the air we breathe. It is also dissolved in water, supporting aquatic life through the process of oxygenation.

Study Guide:

Here are some key points to remember about oxygen:

1. Oxygen is a chemical element with the symbol O and atomic number 8.
2. It is a colorless, odorless gas at room temperature.
3. Oxygen is essential for respiration in living organisms.
4. It has various industrial, medical, and environmental applications.
5. Oxygen makes up about 21% of the Earth's atmosphere.