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5 Written questions

5 Matching questions

  1. molecular formula
  2. antioxidants
  3. dalton (atomic mass unit)
  4. compound
  5. Carbon, Hydrogen, Oxygen, and Nitrogen
  1. a The four major elements in the human body.
  2. b A substance that contains atoms of two or more different elements.
  3. c The standardized unit of measurement for the mass of atoms and their subatomic particles.
  4. d Indicates the elements and the number of atoms of each element that make up a molecule.
  5. e Substances that inactivate oxygen-derived free radicals.

5 Multiple choice questions

  1. The number of protons in an atom.
  2. Calcium, Phosphorous, Potassium, Sulfur, Sodium, Chlorine, Magnesium, and Iron; make up about 3.6% of the body's mass.
  3. The building blocks of all forms of matter -- both living and nonliving; cannot be split into a simpler substance by ordinary chemical means.
  4. The amount of matter in any object; never changes.
  5. The dozens of particles that compose atoms, namely protons, neutrons, and electrons.

5 True/False questions

  1. protons (p⁺)Uncharged (neutral) particles located within the nucleus of an atom.


  2. neutrons (n⁰)Uncharged (neutral) particles located within the nucleus of an atom.


  3. free radicalAn atom or group of atoms with an unpaired electron in the outermost shell; makes the atom unstable, highly reactive, and destructive to nearby molecules.


  4. mass numberThe number of protons in an atom.


  5. Calcium, Phosphorous, Sulfur, Potassium, Sodium, Chlorine, Magnesium, and IronThe eight lesser elements in the human body.


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