Nitrogen is found in the largest quantity in air.

Explanation:

Air is a mixture of gases, and it consists of several different gases in varying quantities. The most abundant gas in air is nitrogen, which makes up about 78% of the total volume of air.

Here is an explanation of why nitrogen is found in the largest quantity in air:

1. Nitrogen's abundance: Nitrogen gas (N2) is highly abundant on Earth. It is a non-reactive gas that exists in the atmosphere in its molecular form. Nitrogen gas makes up the majority of the Earth's atmosphere, and it is found in large quantities in air.

2. Nitrogen fixation: Nitrogen gas is not readily available for most living organisms to use directly. However, certain bacteria have the ability to convert atmospheric nitrogen into a usable form through a process called nitrogen fixation. These nitrogen-fixing bacteria convert nitrogen gas into nitrogen compounds that can be used by plants and other organisms. This process helps maintain the nitrogen cycle and ensures a continuous supply of nitrogen in the environment.

3. Nitrogen's role in living organisms: Nitrogen is an essential element for all living organisms. It is a key component of amino acids, which are the building blocks of proteins. Proteins are essential for the growth and development of living organisms. Additionally, nitrogen is a crucial nutrient for plants, and it plays a vital role in their growth and development.

4. Other gases in air: While nitrogen is the most abundant gas in air, there are other gases present in smaller quantities. Oxygen is the second most abundant gas in air, making up about 21% of the total volume. Carbon dioxide and argon are present in much smaller quantities, with carbon dioxide accounting for about 0.04% and argon accounting for about 0.93% of the total volume of air.

In conclusion, nitrogen is found in the largest quantity in air due to its abundance, its role in the nitrogen cycle, and its importance as a vital element for living organisms.