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5 Written questions

5 Matching questions

  1. Chemical bond
  2. Organic compounds
  3. Alkali metal
  4. Starch
  5. Alkali Metals
  1. a Element in the far left column of the periodic table.
  2. b Natural organic compound.
  3. c Force that holds two atoms together.
  4. d Contain carbon and most of the time they contain hydrogen and oxygen too.
  5. e Soft and extremely reactive like sodium, lithium and potassium.

5 Multiple choice questions

  1. Process that releases energy and there is an increase in temperature.
  2. Body's main energy source, especially in respiration. Sugar is an example.
  3. A synthetic organic compound.
  4. Substance made from carbon.
  5. Needs constant energy to continue, usually a decrease in temperature.

5 True/False questions

  1. MetalsNatural substances or formed from two natural substances.

          

  2. Nuclear FusionSplitting nucleus into smaller pieces.

          

  3. MetalloidsSilicon, boron and arsenic. Have properties similar to metals and nonmetals.

          

  4. Noble gasDo not react naturally with other elements, like argon, neon and xenon.

          

  5. ProductSubstance shown on the right side of a chemical equation.