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5 Written questions

5 Matching questions

  1. molecule
  2. dalton (atomic mass unit)
  3. electron shells
  4. tracers
  5. atoms
  1. a 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).
  2. b Radioisotopes used to follow movements of certain substances through the body.
  3. c Two or more atoms sharing electrons.
  4. d The standardized unit of measurement for the mass of atoms and their subatomic particles.
  5. e The smallest units of matter that retain the properties and characteristics of the elements.

5 Multiple choice questions

  1. The number of protons in an atom.
  2. The dense central core of an atom where protons and neutrons are located.
  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 eight lesser elements in the human body.
  5. The process of giving up or gaining electrons.

5 True/False questions

  1. ionThe amount of matter in any object; never changes.

          

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

          

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

          

  4. trace elementsThe elements that make up the last .4% of the mass of the body.

          

  5. chemical symbolOne 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).