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4 Written questions

3 Multiple choice questions

  1. two dangerous elements can combine to form a ______ (or safe) substance
  2. colorless, odorless, tasteless gas, makes up 21% of air, reacts with materials that burn in air, combines with many other elements
  3. shiny, silvery white, soft, solid, metallic, very reactive

3 True/False questions

  1. sodium chloridepale, green, poisonous gas, has an odor, nonmetal, very reactive


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


  3. hydrogencolorless, odorless, tasteless gas, lightest element, most abundant element in the universe, nonmetal, unreactive