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5 Written Questions

5 Matching Questions

  1. First shell of an atom can contain how many electrons?
  2. Element
  3. Electron
  4. Product
  5. Matter
  1. a 2
  2. b Anything that occupies space and has mass.
  3. c A subatomic particle with a single negative electrical charge. One or more electrons move around the nuclues of an atom.
  4. d An ending material in a chemical reaction.
  5. e A subsctance that cannot be broken down to other substance by ordinary chemcial means.

5 Multiple Choice Questions

  1. A chemical substance that resists changes in pH by accepting hydrogen ions from or donating hydrogen ions to solutions.

    substance that minimize changes in pH.
  2. A substance that increases the hydrogen ion concentration in a solution. 0 on pH scale is a strong acid.
  3. An atom or group of atoms that has gained or lost one or more electrongs, thus acquiring a charge.
  4. The smallest unit of matter that retains the properties of an element.
  5. Decreasing pH of ocean waters due to absoprtion of excess atmospheric CO2 from the burning of fossil fuels.

5 True/False Questions

  1. TemperatureTwo or more atoms held together by covalent bonds.

          

  2. AdhesionThe attraction between different kinds of molecules.

          

  3. SolventA subsctance that cannot be broken down to other substance by ordinary chemcial means.

          

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

          

  5. Chemical ReactionAn 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.

          

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