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![]() It is then cooled to 200 degrees where it becomes a liquid, therefore we can say it has been liquefied. Before entering the fractionating column, air is filtered to remove any excess particles such as dust. Nitrogen and oxygen in air can be separated by the process of fractional distillation. Oxygen makes up one-fifth of the Earth’s atmosphere and the remaining 1% are made up of traces of carbon dioxide (0.04%), water vapour and noble gases, like argon (0.9%) According to the present knowledge, Earths atmosphere is composed of about 78 nitrogen, 21 oxygen, 0.9 argon, and 0.1 other gases. It makes up about four-fifths of the Earth’s atmosphere. In Earth’s atmosphere, nitrogen is the most abundant gas. These amounts have not changed over the last 200 million years. Different types of gases present in air and their percentages: Nitrogen 78. The different gases in the atmosphere are found in different amounts. about four-fifths (approximately 80) nitrogen about one-fifth (approximately 20) oxygen small proportions of various other gases, including carbon dioxide. Gases are found in different proportions. Standard dry air, which is mainly composed of three gases: nitrogen (about 78), oxygen (about 21), and argon (about 1). ![]() In the Earth’s atmosphere today, there are a mixture of gases, including about 80% nitrogen, about 20% oxygen and various other gases. The atmosphere contains a mixture of gases.Gases in the Atmosphere (GCSE Chemistry) Atmospheric Gases Proportions of Atmospheric Gases
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