Define oxygen and nitrogen?
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Oxygen is the gas which is 21% in our atmosphere which help in the process of combustion .It is of atomic number 16 and placed in the 6th group of the modern periodic table
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- Oxygen is a colourless, odourless, tasteless gas essential to living organisms, being taken up by animals, which convert it to carbon dioxide; plants, in turn, utilize carbon dioxide as a source of carbon and return the oxygen to the atmosphere
- Nitrogen is the chemical element with the symbol N and atomic number 7. It was first discovered and isolated by Scottish physician Daniel Rutherford in 1772
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