Oxygen vs. Air

Difference Between Oxygen and Air

The air or the atmosphere is a key constituent of the Earth along with water forming the hydrosphere and soil forming the lithosphere. Since, four and a half billion years, when the earth was formed, the atmosphere was made up of gases such as CO2, hydrogen, water vapor, nitrogen, Methane, hydrogen sulfide and ammonia only. There was no oxygen in the atmosphere. The foremost living organisms have evolved there are about 3.5 billion years and they were not as oxygen for energy production. The last bodies have evolved photosynthesis and they began to release oxygen to the atmosphere as a derivative of photosynthesis. As a result of increasing oxygen in the atmosphere, organisms modified to use oxygen.


Air is nothing but a mixture of several types of gases in different quantities that includea water vapor and particulate matter of :-

A) Nitrogen (78%)

B)  Oxygen (21%),

C) Argon (0.9%) and

D) Carbon dioxide (0.03%)

These gases make up to 99.99% of the air. Other gases such as krypton, neon, helium, sulfur dioxide, ammonia, hydrogen and methane and ammonia are present only in minute concentrations and therefore known as trace gases. The air is important for the drawings of climate and absorbs harmful solar, acoustic wave propagation, etc… Depending on the composition of air, it can have a color or odor, but of course, the air is colorless and odorless. If there are more questions of particle, for instance, where a factory smoke are emitted, the air can have a dark color and a smell of chemicals. The air pollution is the worsening of air quality by releasing substances or energy in such quantities that avert the operation of balanced / smooth natural processes and generate uninvited environmental health effects. The main air pollutants are sulfur dioxide, nitrogen oxides, carbon monoxide, CFCs, hydrocarbons, Ozone,¬† particulate issue and carbon dioxide. These are issued as a result of human activities and it ensued in different global problems currently.


Oxygen is the element with atomic number 8, which is present in the group 16 of the periodic table. Oxygen has three isotopes, 16O, 17O, 18O. Of these 16O is the most abundant isotope. The oxygen atom has eight electrons, and it can get two more electrons to another atom to form a-2 anion charge. Otherwise, two oxygen atoms can share four electrons to form a diatomic molecule (O2) to be firm. The molecular weight of O2 is 32 g mole -1. Three atomic form of oxygen, which is also predictable as ozone is another common form of oxygen. Oxygen in its molecular form is an odorless, is a colorless gas. The atmosphere is made up of up to 21% of Oxygen. It is sparingly soluble in water and  slightly heavier than air. Oxygen is highly reactive with all the elements to form oxides excluding the immobile gases. In shirt Oxygen forms a very good oxidizing agent. For their respiration, the living beings require Oxygen, which is also required in case of Combustion too. Oxygen is used in hospitals, welding and numerous other industries.



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