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4 Written questions

3 Multiple choice questions

  1. colorless, odorless, tasteless gas, makes up 21% of air, reacts with materials that burn in air, combines with many other elements
  2. two dangerous elements can combine to form a ______ (or safe) substance
  3. pale, green, poisonous gas, has an odor, nonmetal, very reactive

3 True/False questions

  1. carbon dioxidecolorless gas that plants take in during photosynthesis, changes to a solid without first becoming a liquid, denser than air


  2. waterunreactive nonmetal, at high temperatures reacts with other elements, burns, forms a huge variety of compounds


  3. aqueous solutionhomogenous mixture in which water is the solvent