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5 Written questions

5 Matching questions

  1. Evaporative Cooling
  2. Product
  3. Second shell of an atom can contain how many electrons?
  4. Chemical Bonds
  5. Solution
  1. a 8
  2. b An ending material in a chemical reaction.
  3. c A liquid that is a homogeneous mixture of two or more substances.
  4. d occurs because the molecules with the greates energy leave.
  5. e An attraction between two atoms resulting from a sharing of outer-shell electrons or the presence of opposite charges on the atoms. The bonded atoms gain complete outer electron shells.

5 Multiple choice questions

  1. Decreasing pH of ocean waters due to absoprtion of excess atmospheric CO2 from the burning of fossil fuels.
  2. The sum of the number of protons and neutrons in an atom's nucleus.
  3. An energy level representing the distance of an electron from the nucleus of an atom.
  4. A measure of how difficult it is to stretch or break the surface of a liquid. Water has a high surface tension because of the hydrogen bonding of surface molecules.
  5. an element that is essential for life but required in extremely minute amounts.

5 True/False questions

  1. What 4 elements make up about 96% of living matter?Oxygen, carbon, hydrogen, and nitrogen.

          

  2. Fourth shell of an atom can contain how many electrons?2

          

  3. Atomic NumberThe sum of the number of protons and neutrons in an atom's nucleus.

          

  4. NucleusAn atom's central core, containing protons and neutrons.

          

  5. Aqueous SolutionA liquid that is a homogeneous mixture of two or more substances.