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5 Written questions

5 Matching questions

  1. Mass Number
  2. Evaporative Cooling
  3. Ionic Bond
  4. Element
  5. Chemical Reaction
  1. a A subsctance that cannot be broken down to other substance by ordinary chemcial means.
  2. b The making and breaking of chemical bonds, leading to changes in the composition of matter.
  3. c The sum of the number of protons and neutrons in an atom's nucleus.
  4. d occurs because the molecules with the greates energy leave.
  5. e A chemical bond resulting from the attraction between oppositely charged ions.

5 Multiple choice questions

  1. An isotope whose nucleus decays spontaneously, giving off particles and energy.
  2. 8
  3. The dissolving agent of a solution. Water is the most versatile solvent known.
  4. A solution in which water is the solvent.
  5. The amount of energy associated with the movement of atoms and molecules in a body of matter.

5 True/False questions

  1. SoluteA compound resulting from the formation of ionic bonds; also called an ionic compound.


  2. ElectronegativityAn energy level representing the distance of an electron from the nucleus of an atom.


  3. AtomThe smallest unit of matter that retains the properties of an element.


  4. First shell of an atom can contain how many electrons?8


  5. Acid PrecipitationRain, snow or fog that is more acidic than pH 5.2.


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