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5 Written questions

5 Matching questions

  1. Organic compounds
  2. Radioactive tracers
  3. Protein
  4. Chemical bond
  5. Metalloids
  1. a Amino acids are combined to make a larger molecule.
  2. b Force that holds two atoms together.
  3. c Silicon, boron and arsenic. Have properties similar to metals and nonmetals.
  4. d Contain carbon and most of the time they contain hydrogen and oxygen too.
  5. e Used to detect cancer tumors.

5 Multiple choice questions

  1. Do not react naturally with other elements, like argon, neon and xenon.
  2. Process that releases energy and there is an increase in temperature.
  3. Organic compound that contains many carbon-hydrogen bonds but few carbon-oxygen bonds.
  4. Tastes sour and turns blue litmus paper pink, pH is less than 7.
  5. Element in the far right column of the periodic table.

5 True/False questions

  1. RadiationA substance that changes color as pH of solution changes.

          

  2. EndothermicProcess that releases energy and there is an increase in temperature.

          

  3. BaseTastes sour and turns blue litmus paper pink, pH is less than 7.

          

  4. MetalsNatural substances or formed from two natural substances.

          

  5. ReactantSubstance that's present before a chemical reaction starts.