You can test for oxygen by placing a glowing splint (not lit but not out) into the test tube where you think oxygen is present. If the splint relights, that means that it is oxygen. If this doesn't happen, then in your case it will be nitrogen.
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A slogan is a quick and simple way to get exposure for a product. The atomic number for nitrogen is 7. A good slogan for the element nitrogen would be: Nitrogen Lucky #7.
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what would happen if oxygen increased would probaly not be any more benefcial, because we survive off of oxygen and if it could be beneficial beacuse it could be more pressure in out body and we wouldnt be able to take all of that in.
Fire needs the oxygen in the air. Any other source of oxygen would also sustain fire.
yes there are. biological events would not have been able to occur if geological events didnt occur. for example, if there was no oxygen in the atmosphere (geological event) plants would not have been able to come to life (biological event).