5 Written Questions
5 Matching Questions
- radioactive isotopes (radioisotopes)
- lesser elements
- mass number
- a The sum of an atom's protons and neutrons.
- b The science of the structure and interactions of matter.
- 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.
- d The process of giving up or gaining electrons.
- e Calcium, Phosphorous, Potassium, Sulfur, Sodium, Chlorine, Magnesium, and Iron; make up about 3.6% of the body's mass.
5 Multiple Choice Questions
- 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).
- 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).
- Radioisotopes used to follow movements of certain substances through the body.
- The building blocks of all forms of matter -- both living and nonliving; cannot be split into a simpler substance by ordinary chemical means.
- The dozens of particles that compose atoms, namely protons, neutrons, and electrons.
5 True/False Questions
atomic mass (atomic weight) → The average mass of all of an atom's naturally occurring isotopes.
ion → The smallest units of matter that retain the properties and characteristics of the elements.
atoms → Anything that occupies space and has mass.
free radical → 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.
major elements → Carbon, Hydrogen, Oxygen, and Nitrogen; they alone make up about 96% of the body's mass.