chemistry

chemistry
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  • we are the Oxygen, which is a chemical element with symbol O and atomic number 8 . physically, we are odorless and colourless as well as intangible. we will boil at -183'C and melt at -218'C.  Chemically, for example, I always combine with 2 hydrogen to form water. 
  • We were discovered by Carl Wilhelm in 1772. the word Oxygen comes from a Greek word that means "acid-former ' we can be used in the Medical aspect. For instance, we are used to help patients with breathing difficulties.
  • what will it be if oxygen began slowing disappearing?
  •  oxygen constitute 45% of the earth crust, the water bodies will start to evaporate into the space  there will be no water left on the earth that means no phytoplanktons  fishes and sew creatures
  • the airplane engine can't function well or even stop working as it uses the internal combination
  • People will have hypoxia or may even die as the oxygen is not sufficient for them to survive. 
  • XXX 1999-2018
  • the concrete buildings will start to collapse as oxygen helps to bind all concrete structures
  •  at last, if the oxygen disappeared, the earth crust will start crumbling (breaking and falling apart to small pieces
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