Question types

Start with

Question limit

of 32 available terms

Advertisement Upgrade to remove ads
Print test

5 Written questions

5 Matching questions

  1. free radical
  2. atoms
  3. electrons (e⁻)
  4. mass number
  5. chemical symbol
  1. a The smallest units of matter that retain the properties and characteristics of the elements.
  2. b The sum of an atom's protons and neutrons.
  3. c An 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. d Negatively charged particles located in a cloud, moving about the nucleus of an atom.
  5. e One or two letters of an element's name in English, Latin, or another language (ex. H for Hydrogen, Ne for Neon, or K for Potassium).

5 Multiple choice questions

  1. The eight lesser elements in the human body.
  2. Positively charged particles located within the nucleus of an atom.
  3. The average mass of all of an atom's naturally occurring isotopes.
  4. Substances that inactivate oxygen-derived free radicals.
  5. The dozens of particles that compose atoms, namely protons, neutrons, and electrons.

5 True/False questions

  1. half-lifeThe time required for half of the radioactive atoms in a sample of an isotope to decay into a more stable form.


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


  3. radioactive isotopes (radioisotopes)Unstable isotopes; their nuclei decay into a stable configuration over time, emitting radiation as they do so, and transform into a different element; the time span of the change is anywhere from a fraction of a second to millions of years, depending on the isotope.


  4. trace elementsCalcium, Phosphorous, Potassium, Sulfur, Sodium, Chlorine, Magnesium, and Iron; make up about 3.6% of the body's mass.


  5. moleculeTwo or more atoms sharing electrons.