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5 Written questions

5 Matching questions

  1. Calcium, Phosphorous, Sulfur, Potassium, Sodium, Chlorine, Magnesium, and Iron
  2. matter
  3. antioxidants
  4. electron shells
  5. trace elements
  1. a Anything that occupies space and has mass.
  2. b The eight lesser elements in the human body.
  3. c Substances that inactivate oxygen-derived free radicals.
  4. d The regions outside the nucleus that electrons move about in; depicted as simple circles around the nucleus; each region holds a specific number of electrons (2.8.18).
  5. e The elements that make up the last .4% of the mass of the body.

5 Multiple choice questions

  1. Positively charged particles located within the nucleus of an atom.
  2. The dozens of particles that compose atoms, namely protons, neutrons, and electrons.
  3. The science of the structure and interactions of matter.
  4. Calcium, Phosphorous, Potassium, Sulfur, Sodium, Chlorine, Magnesium, and Iron; make up about 3.6% of the body's mass.
  5. The time required for half of the radioactive atoms in a sample of an isotope to decay into a more stable form.

5 True/False questions

  1. atomic numberThe sum of an atom's protons and neutrons.


  2. ionThe smallest units of matter that retain the properties and characteristics of the elements.


  3. atomic mass (atomic weight)The number of protons in an atom.


  4. Carbon, Hydrogen, Oxygen, and NitrogenThe four major elements in the human body.


  5. tracersRadioisotopes used to follow movements of certain substances through the body.