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5 Written questions

5 Matching questions

  1. pH Scale
  2. Trace elements
  3. Solution
  4. Neutron
  5. Product
  1. a An ending material in a chemical reaction.
  2. b A scale we used to describe how acidic or basic a solution is. The scale ranges from 0-14, 0 being the most acidic and 14 being the most basic. 7 is neutral (pure water)
  3. c an element that is essential for life but required in extremely minute amounts.
  4. d A liquid that is a homogeneous mixture of two or more substances.
  5. e A subatomic particle having no electrical charge, found in the nucleus of an atom.

5 Multiple choice questions

  1. The total mass of an atom; also called atomic weight. Given as a whole number, the atomic mass approximately equals the mass number.
  2. Two or more atoms held together by covalent bonds.
  3. A compound resulting from the formation of ionic bonds; also called an ionic compound.
  4. Rain, snow or fog that is more acidic than pH 5.2.
  5. Neutrons and protons.

5 True/False questions

  1. Atomic NumberThe number of protons in each atom of a particular element.

          

  2. SoluteA substance that is dissolved in a solution.

          

  3. BaseA substance that decreases the hydrogen ion concentration in a solution. 14 is a strong base on the pH scale.

          

  4. ElectronA subatomic particle having no electrical charge, found in the nucleus of an atom.

          

  5. BuffersAn atom's central core, containing protons and neutrons.