5 Written questions
5 Matching questions
- chemical elements
- radioactive isotopes (radioisotopes)
- electrons (e⁻)
- lesser elements
- a Negatively charged particles located in a cloud, moving about the nucleus of an atom.
- b Calcium, Phosphorous, Potassium, Sulfur, Sodium, Chlorine, Magnesium, and Iron; make up about 3.6% of the body's mass.
- 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 Substances that inactivate oxygen-derived free radicals.
- e The building blocks of all forms of matter -- both living and nonliving; cannot be split into a simpler substance by ordinary chemical means.
5 Multiple choice questions
- Radioisotopes used to follow movements of certain substances through the body.
- The sum of an atom's protons and neutrons.
- Carbon, Hydrogen, Oxygen, and Nitrogen; they alone make up about 96% of the body's mass.
- 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.
- The average mass of all of an atom's naturally occurring isotopes.
5 True/False questions
ion → An atom that has a positive or negative charge because it has unequal numbers of protons and electrons.
dalton (atomic mass unit) → The standardized unit of measurement for the mass of atoms and their subatomic particles.
atoms → The smallest units of matter that retain the properties and characteristics of the elements.
electron shells → Negatively charged particles located in a cloud, moving about the nucleus of an atom.
chemical symbol → 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).