Answers

2014-06-03T09:53:49+05:30
          nitrogen makes up the bulk of earths atmosphere that is 78.1 percent in volume.carbon is the chemical element c and atomic number 6.carbon is harmful to our atmosphere.chlorine is two and half heavier than air.chlorine was the first gas used in chemical warfare in world war 1.phosphorus exist in state of matter as solid,liquids,gases and plasma.          
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