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5 Written questions

5 Matching questions

  1. Solute
  2. Solution
  3. Heat
  4. Proton
  5. Radioactive Isotope
  1. a A liquid that is a homogeneous mixture of two or more substances.
  2. b A subatomic particle with a single positive electrical charge, found in the nucleus of an atom.
  3. c A substance that is dissolved in a solution.
  4. d An isotope whose nucleus decays spontaneously, giving off particles and energy.
  5. e The amount of energy associated with the movement of atoms and molecules in a body of matter.

5 Multiple choice questions

  1. 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)
  2. The dissolving agent of a solution. Water is the most versatile solvent known.
  3. Measures the intensity of heat.
  4. A solution in which water is the solvent.
  5. Decreasing pH of ocean waters due to absoprtion of excess atmospheric CO2 from the burning of fossil fuels.

5 True/False questions

  1. ElementA subsctance that cannot be broken down to other substance by ordinary chemcial means.

          

  2. AcidA substance that increases the hydrogen ion concentration in a solution. 0 on pH scale is a strong acid.

          

  3. Hydrogen BondsA type of weak chemical bond formed when the partially positive hydrogen atom participating in a polar covalent bond in one molecule is attracted to the partially negative atom participating in a polar covalent bond in another molecule (or in another region of the same molecule).

          

  4. ElectronegativityThe attraction of a given atom for the electrons of a covalent bond.

          

  5. Mass NumberThe number of protons in each atom of a particular element.

          

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