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BIOL 2401 Vocabulary 2.1 (Chemical Level of Organization: How Matter is Organized) Test

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5 Written Questions

5 Matching Questions

  1. Chemistry
  2. radioactive isotopes (radioisotopes)
  3. lesser elements
  4. mass number
  5. ionization
  1. a The sum of an atom's protons and neutrons.
  2. b The science of the structure and interactions of matter.
  3. c 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. d The process of giving up or gaining electrons.
  5. e Calcium, Phosphorous, Potassium, Sulfur, Sodium, Chlorine, Magnesium, and Iron; make up about 3.6% of the body's mass.

5 Multiple Choice Questions

  1. 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).
  2. 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).
  3. Radioisotopes used to follow movements of certain substances through the body.
  4. The building blocks of all forms of matter -- both living and nonliving; cannot be split into a simpler substance by ordinary chemical means.
  5. The dozens of particles that compose atoms, namely protons, neutrons, and electrons.

5 True/False Questions

  1. atomic mass (atomic weight)The average mass of all of an atom's naturally occurring isotopes.


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


  3. atomsAnything that occupies space and has mass.


  4. 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.


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


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