Tag: natural disasters: winds, storms and cyclones

The proportion of nitrogen in the open air is 78% by volume.
Note:
Air is a mixture of gases. The volume percent of nitrogen and oxygen are 78%and 21% respectively. Air also contains tiny amounts of carbon dioxide, argon, methane, ozone and water vapour.

Nitrogen$(N _2)$, Carbon dioxide$(CO _2)$, Oxygen$(O _2)$, Ozone$(O _3)$ are part of the atmosphere but chlorine$(Cl _2)$ is not a part of atmosphere.

Oxygen is a chemical element, with the symbol O. Several allotropes, or molecular forms, of it exist, but the three most common in our environment are molecular oxygen, or dioxide, O₂

Air contains some gases, water vapours and dust particles that stick to a transparent glass of windows and it appears hazy. 

By volume dry air contains $78.09\%$ Nitrogen, $20.95\%$ Oxygen, $0.93\%$ Argon, $0.04\%$ Carbon dioxide and small traces of other gases.

The percentage of Nitrogen in air is $78\%$.

Air is composed of various gases in different proportions which can be separated using chemical methods.

Air contains 78% Nitrogen. So, it contributes more no. of moles to partial pressure than any other gas in the atmosphere. So, it has the highest partial pressure. 

The compound compound $ He$ is chemically unreactive (inert) and do not forms compound under normal reaction conditions.$He _2$ does not exist.

A greenhouse gas that absorbs energy and maintains earth's temperature is carbon dioxide.