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5 Written questions

5 Matching questions

  1. SI
  2. volume percent (solution)
  3. Pauli exclusion principle
  4. parts per million
  5. law of definite composition
  1. a The volume of solute in 100 mL of solution.
  2. b An atomic orbital can hold a maximum of two electrons which must have opposite spins.
  3. c An agreed upon system of measurements by scientists.
  4. d A measurement of the concentration of dilute solutions now commonly used by chemists in place of mass percent.
  5. e A compound always contains two or more elements in a definite proportion by mass.

5 Multiple choice questions

  1. The area of chemistry that deals with the quantitative relationships among reactants and products in a chemical reaction.
  3. Thomson asserted that atoms are not indivisible but are composed of smaller parts; they contain both positively and negatively charged particles- protons as well as electrons.
  4. A homogeneous part of a system separated from the other parts by a physical boundary.
  5. Existing within the atom, these energy levels contain orbitals within which electrons are found.

5 True/False questions

  1. percent yieldA gas that behaves exactly according to theory.


  2. torrAn explanation of the general principles of certain phenomena with considerable evidence to support it; a well established hypothesis.


  3. ionization energyStored energy, or the energy of an object due to its relative position.


  4. solubilityThe ability of a solute to dissolve in a solvent.


  5. periodic tableAn 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.


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