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5 Written questions

5 Matching questions

  1. Gay-Lussac's law
  2. solubility
  3. mass number
  4. photon
  5. law of definite composition
  1. a The ability of a solute to dissolve in a solvent.
  2. b At constant volume, the pressure of a fixed mass is directly proportional to the absolute temperature.
  3. c The sum of the protons and neutrons in the nucleus of a given isotope of an atom.
  4. d A tiny packet of energy that streams with others of its kind to produce a beam of light.
  5. e A compound always contains two or more elements in a definite proportion by mass.

5 Multiple choice questions

  1. Matter containing two or more substances, which can be present in variable amounts.
  2. Inherent physical properties of a substance that can be determined without altering its composition: color, taste, odor, state of matter, density, melting point, boiling point.
  3. Stored energy, or the energy of an object due to its relative position.
  4. An arrangement of the elements according to their atomic numbers. The table consists of horizontal rows, or periods, and vertical columns, or families, of elements. Each period ends with a noble gas.
  5. Matter that is homogeneous and has a definite, fixed composition; substances occur in two forms- elements and compounds.

5 True/False questions

  1. sublimationThe substance that the solute is dissolved into.


  2. transition elementsThe energy required to remove an electron from an atom.


  3. isotopeThe substance that is dissolved in a solution.


  4. volatile substanceA reactant the limits the amount of product formed by running out first in a chemical reaction.


  5. molar solutionAn ion composed of more than one atom.