As an expert in the field of atmospheric science, I can provide you with a comprehensive answer regarding the presence of hydrogen in the air.

The composition of Earth's atmosphere is a complex mixture of various gases, each with its own unique properties and concentrations. When we talk about the air we breathe, it's important to understand that it is predominantly composed of nitrogen and oxygen, with nitrogen making up approximately 78% and oxygen about 21% of the atmosphere by volume. These two gases are the most abundant and are essential for life on Earth.

However, there are also trace amounts of other gases present in the atmosphere. Among these, argon is the third most abundant gas, making up about 0.93% of the atmosphere. Carbon dioxide, a critical component for the process of photosynthesis in plants and a greenhouse gas contributing to global warming, is present at a concentration of about 0.04%. Neon, helium, methane, krypton, and xenon are also present in trace amounts.

Now, coming to the question of hydrogen in the air, it is indeed present, but in very minute quantities. According to the information provided, hydrogen is one of the gases that make up clean air, albeit in trace amounts. It is important to note that hydrogen is a very light gas and is highly reactive, which means it does not remain in the atmosphere for long periods. It readily combines with other elements, particularly oxygen, to form water (H2O) or other compounds. This reactivity and the fact that it is lighter than air cause it to rise and disperse quickly into the upper atmosphere or escape into space.

The concentration of hydrogen in the atmosphere is not constant and can vary due to various factors such as geological activity, human activities, and natural processes. For instance, volcanic eruptions can release hydrogen gas into the atmosphere, and certain industrial processes can also contribute to its presence.

It's also worth mentioning that hydrogen is not typically found as a free atom in the lower atmosphere. Instead, it is usually found in the form of compounds, such as water vapor (H2O), which is a significant component of the atmosphere, especially in the troposphere where weather occurs. Water vapor can vary in concentration significantly depending on the humidity and temperature of the air.

In summary, while hydrogen is indeed a component of Earth's atmosphere, it is present in very low concentrations and is mostly found in compound forms rather than as a free element. Its reactivity and lightness cause it to not accumulate in significant amounts in the lower atmosphere.

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Here are 10 gases that make up clean air: In order of highest to lowest concentration they are Nitrogen, Oxygen, Argon, Carbon dioxide, Neon, Helium, Methane (CH4), Krypton, Hydrogen, and Xenon. Five of them travel alone, so we call them atoms. ... 8 out of 10 atoms (or molecules) of air are made of nitrogen.Mar 4, 2013read more >>