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5 Written questions

5 Matching questions

  1. compound
  2. atoms
  3. lesser elements
  4. dalton (atomic mass unit)
  5. tracers
  1. a The smallest units of matter that retain the properties and characteristics of the elements.
  2. b Radioisotopes used to follow movements of certain substances through the body.
  3. c A substance that contains atoms of two or more different elements.
  4. d Calcium, Phosphorous, Potassium, Sulfur, Sodium, Chlorine, Magnesium, and Iron; make up about 3.6% of the body's mass.
  5. e The standardized unit of measurement for the mass of atoms and their subatomic particles.

5 Multiple choice questions

  1. The average mass of all of an atom's naturally occurring isotopes.
  2. The elements that make up the last .4% of the mass of the body.
  3. Two or more atoms sharing electrons.
  4. 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.
  5. The building blocks of all forms of matter -- both living and nonliving; cannot be split into a simpler substance by ordinary chemical means.

5 True/False questions

  1. Carbon, Hydrogen, Oxygen, and NitrogenThe standardized unit of measurement for the mass of atoms and their subatomic particles.

          

  2. major elementsCarbon, Hydrogen, Oxygen, and Nitrogen; they alone make up about 96% of the body's mass.

          

  3. subatomic particlesThe number of protons in an atom.

          

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

          

  5. electrons (e⁻)Uncharged (neutral) particles located within the nucleus of an atom.

          

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