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5 Written questions

5 Matching questions

  1. Ionic Bond
  2. Ion
  3. Radioactive Isotope
  4. Solute
  5. Evaporative Cooling
  1. a A substance that is dissolved in a solution.
  2. b An isotope whose nucleus decays spontaneously, giving off particles and energy.
  3. c occurs because the molecules with the greates energy leave.
  4. d An atom or group of atoms that has gained or lost one or more electrongs, thus acquiring a charge.
  5. e A chemical bond resulting from the attraction between oppositely charged ions.

5 Multiple choice questions

  1. A type of weak chemical bond formed when the partially positive hydrogen atom participating in a polar covalent bond in one molecule is attracted to the partially negative atom participating in a polar covalent bond in another molecule (or in another region of the same molecule).
  2. The total mass of an atom; also called atomic weight. Given as a whole number, the atomic mass approximately equals the mass number.
  3. An energy level representing the distance of an electron from the nucleus of an atom.
  4. Oxygen, carbon, hydrogen, and nitrogen.
  5. Neutrons and protons.

5 True/False questions

  1. NeutronA subatomic particle with a single negative electrical charge. One or more electrons move around the nuclues of an atom.


  2. Trace elementsan element that is essential for life but required in extremely minute amounts.


  3. Second shell of an atom can contain how many electrons?8


  4. CohesionThe attraction between different kinds of molecules.


  5. First shell of an atom can contain how many electrons?18