Nitrogen: The Essential Element

Nitrogen is an essential element that is found in all living organisms. It is the most abundant gas in the Earth's atmosphere, making up about 78% of the air we breathe. Nitrogen is also a key component of proteins, DNA, and other important molecules in living organisms.

Properties of Nitrogen

• Atomic Number: 7
• Symbol: N
• Atomic Mass: 14.00674 amu
• State at Room Temperature: Gas
• Boiling Point: -195.79°C
• Freezing Point: -210.01°C

Uses of Nitrogen

Nitrogen has many important industrial and scientific applications, including:

1. As a component in fertilizer to promote plant growth
2. In the production of ammonia, which is used to make various chemical compounds
3. In the food packaging industry to help preserve freshness and prevent spoilage
4. As a coolant in industrial processes

The Nitrogen Cycle

Nitrogen is cycled through the environment in a process known as the nitrogen cycle. This cycle involves various processes such as nitrogen fixation, nitrification, assimilation, and denitrification, which are carried out by different organisms in the ecosystem.

Study Guide

Here are some key points to remember about nitrogen:

1. What is the percentage of nitrogen in the Earth's atmosphere?
2. What are the key components of living organisms that contain nitrogen?
3. What are the industrial and scientific uses of nitrogen?
4. Explain the nitrogen cycle and its importance in the environment.

Remember to review the properties, uses, and cycle of nitrogen to gain a comprehensive understanding of this important element.