5 Written questions
5 Matching questions
- lesser elements
- dalton (atomic mass unit)
- a The smallest units of matter that retain the properties and characteristics of the elements.
- b Radioisotopes used to follow movements of certain substances through the body.
- c A substance that contains atoms of two or more different elements.
- d Calcium, Phosphorous, Potassium, Sulfur, Sodium, Chlorine, Magnesium, and Iron; make up about 3.6% of the body's mass.
- e The standardized unit of measurement for the mass of atoms and their subatomic particles.
5 Multiple choice questions
- The average mass of all of an atom's naturally occurring isotopes.
- The elements that make up the last .4% of the mass of the body.
- Two or more atoms sharing electrons.
- 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.
- 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
Carbon, Hydrogen, Oxygen, and Nitrogen → The standardized unit of measurement for the mass of atoms and their subatomic particles.
major elements → Carbon, Hydrogen, Oxygen, and Nitrogen; they alone make up about 96% of the body's mass.
subatomic particles → The number of protons in an atom.
neutrons (n⁰) → Uncharged (neutral) particles located within the nucleus of an atom.
electrons (e⁻) → Uncharged (neutral) particles located within the nucleus of an atom.