5 Written questions
5 Matching questions
- major elements
- mass number
- a A substance that contains atoms of two or more different elements.
- b Carbon, Hydrogen, Oxygen, and Nitrogen; they alone make up about 96% of the body's mass.
- c An atom that has a positive or negative charge because it has unequal numbers of protons and electrons.
- d The sum of an atom's protons and neutrons.
- e Anything that occupies space and has mass.
5 Multiple choice questions
- The standardized unit of measurement for the mass of atoms and their subatomic particles.
- Indicates the elements and the number of atoms of each element that make up a molecule.
- 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.
- 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 science of the structure and interactions of matter.
5 True/False questions
nucleus → The dense central core of an atom where protons and neutrons are located.
electron shells → 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).
chemical elements → 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).
subatomic particles → The dozens of particles that compose atoms, namely protons, neutrons, and electrons.
Calcium, Phosphorous, Sulfur, Potassium, Sodium, Chlorine, Magnesium, and Iron → The eight lesser elements in the human body.