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5 Written questions

5 Matching questions

  1. trigonal planar
  2. quanta
  3. torr
  4. VSEPR
  5. temperature
  1. a An arrangement of atoms in the VSEPR model where the three pairs of electrons are placed 120 degrees apart on a flat plane.
  2. b Small discrete increments of energy.
  3. c A measure of the intensity of heat, or of how hot or cold a system is; SI unit is the kelvin (K).
  4. d A unit of pressure (1 torr = 1 mm Hg).
  5. e Valence-shell electron-pair repulsion; a simple model for predicting the shapes of molecules.

5 Multiple choice questions

  1. The resistance in a liquid to increase its surface area.
  2. A tiny packet of energy that streams with others of its kind to produce a beam of light.
  3. The dense center of an atom.
  4. A solid that contains water molecules as part of its crystalline structure.
  5. A reactant the limits the amount of product formed by running out first in a chemical reaction.

5 True/False questions

  1. subscriptMatter that is homogeneous and has a definite, fixed composition; substances occur in two forms- elements and compounds.

          

  2. isotopeA tiny packet of energy that streams with others of its kind to produce a beam of light.

          

  3. reactantSmall discrete increments of energy.

          

  4. partial pressureThe pressure exerted independently by each gas in a mixture of gases.

          

  5. speed (of a wave)A gas that behaves exactly according to theory.

          

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