5 Written questions
5 Matching questions
- molecular formula
- dalton (atomic mass unit)
- Carbon, Hydrogen, Oxygen, and Nitrogen
- a The four major elements in the human body.
- b A substance that contains atoms of two or more different elements.
- c The standardized unit of measurement for the mass of atoms and their subatomic particles.
- d Indicates the elements and the number of atoms of each element that make up a molecule.
- e Substances that inactivate oxygen-derived free radicals.
5 Multiple choice questions
- The number of protons in an atom.
- Calcium, Phosphorous, Potassium, Sulfur, Sodium, Chlorine, Magnesium, and Iron; make up about 3.6% of the body's mass.
- The building blocks of all forms of matter -- both living and nonliving; cannot be split into a simpler substance by ordinary chemical means.
- The amount of matter in any object; never changes.
- The dozens of particles that compose atoms, namely protons, neutrons, and electrons.
5 True/False questions
protons (p⁺) → Uncharged (neutral) particles located within the nucleus of an atom.
neutrons (n⁰) → Uncharged (neutral) particles located within the nucleus of an atom.
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.
mass number → The number of protons in an atom.
Calcium, Phosphorous, Sulfur, Potassium, Sodium, Chlorine, Magnesium, and Iron → The eight lesser elements in the human body.