5 Written Questions
5 Matching Questions
- dalton (atomic mass unit)
- protons (p⁺)
- a Substances that inactivate oxygen-derived free radicals.
- b Radioisotopes used to follow movements of certain substances through the body.
- c Positively charged particles located within the nucleus of an atom.
- d The science of the structure and interactions of matter.
- e The standardized unit of measurement for the mass of atoms and their subatomic particles.
5 Multiple Choice Questions
- Carbon, Hydrogen, Oxygen, and Nitrogen; they alone make up about 96% of the body's mass.
- An atom that has a positive or negative charge because it has unequal numbers of protons and electrons.
- The dozens of particles that compose atoms, namely protons, neutrons, and electrons.
- The smallest units of matter that retain the properties and characteristics of the elements.
- Indicates the elements and the number of atoms of each element that make up a molecule.
5 True/False Questions
Carbon, Hydrogen, Oxygen, and Nitrogen → The standardized unit of measurement for the mass of atoms and their subatomic particles.
atomic number → The number of protons in an atom.
molecule → Two or more atoms sharing electrons.
atomic mass (atomic weight) → The average mass of all of an atom's naturally occurring isotopes.
chemical symbol → The building blocks of all forms of matter -- both living and nonliving; cannot be split into a simpler substance by ordinary chemical means.