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5 Written questions

5 Matching questions

  1. neutrons (n⁰)
  2. lesser elements
  3. Chemistry
  4. protons (p⁺)
  5. electrons (e⁻)
  1. a Uncharged (neutral) particles located within the nucleus of an atom.
  2. b Negatively charged particles located in a cloud, moving about the nucleus of an atom.
  3. c The science of the structure and interactions of matter.
  4. d Calcium, Phosphorous, Potassium, Sulfur, Sodium, Chlorine, Magnesium, and Iron; make up about 3.6% of the body's mass.
  5. e Positively charged particles located within the nucleus of an atom.

5 Multiple choice questions

  1. 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).
  2. The time required for half of the radioactive atoms in a sample of an isotope to decay into a more stable form.
  3. Two or more atoms sharing electrons.
  4. The sum of an atom's protons and neutrons.
  5. Carbon, Hydrogen, Oxygen, and Nitrogen; they alone make up about 96% of the body's mass.

5 True/False questions

  1. atomsAn atom that has a positive or negative charge because it has unequal numbers of protons and electrons.


  2. dalton (atomic mass unit)The dozens of particles that compose atoms, namely protons, neutrons, and electrons.


  3. molecular formulaTwo or more atoms sharing electrons.


  4. nucleusThe dense central core of an atom where protons and neutrons are located.


  5. massThe amount of matter in any object; never changes.