What is Nitrogen?. . . . . .
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the chemical element of atomic number 7, a colourless, odourless unreactive gas that forms about 78 per cent of the earth's atmosphere. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant.
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Gas
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A gas that has no colour, taste or smell. Nitrogen forms about 80% of the air around the earth
नाइट्रोजन गैस (रंग-स्वाद-गंधहीन और पृथ्वी के 80% वायुमंडल में व्याप्त)
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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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