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  • Others 
    Ions

    Ions

    Ions are electrically charged particles obtained from an atom or from a chemically bonded group of atoms by adding or removing electrons. Eight examples illustrate the number of protons, neutrons, and electrons in positive ions (cations) and in negative ions (anions).

    Subjects:
    Chemistry
    Keywords:
    Ions
    Resource Type:
    Others
     
  • Others 
    Melting Point and Freezing Point

    Melting Point and Freezing Point

    Learners observe that the melting of a solid and the freezing of its liquid occur at the same temperature. The melting point is an intrinsic property and is used to identify a substance.

    Subjects:
    Chemistry
    Keywords:
    Melting points Freezing points
    Resource Type:
    Others
     
  • Others 
    Oxidation Numbers

    Oxidation Numbers

    Learners assign oxidation numbers to atoms in neutral compounds and in polyatomic ions. Six examples are worked through in detail, and three problems are provided.

    Subjects:
    Chemistry
    Keywords:
    Reduction (Chemistry) Chemical reactions Oxidation Oxidation-reduction reaction
    Resource Type:
    Others
     
  • Others 
    A Biological Example of Water Solubility

    A Biological Example of Water Solubility

    In this animated object, students examine the role that the solubility of water plays in various biological functions.

    Subjects:
    Chemistry
    Keywords:
    Water chemistry
    Resource Type:
    Others
     
  • Others 
    Absolute Zero Temperature

    Absolute Zero Temperature

    Learners view illustrations showing the direct dependence of the volume of a gas on temperature and consider the relationship between the Kelvin and Celsius temperature scales.

    Subjects:
    Chemistry
    Keywords:
    Temperature Low temperatures
    Resource Type:
    Others
     
  • Others 
    Equilibrium

    Equilibrium

    In this animated object, students examine the role equilibrium plays in everyday life. Formulas are presented in an interactive way.

    Subjects:
    Chemistry
    Keywords:
    Chemical equilibrium
    Resource Type:
    Others
     
  • Others 
    Pressure and Boyle's Law

    Pressure and Boyle's Law

    Students examine standard pressure in this interactive object.

    Subjects:
    Chemistry
    Keywords:
    Boyle's law Gas laws (Physical chemistry)
    Resource Type:
    Others
     
  • Others 
    Macroscale vs. Nanoscale

    Macroscale vs. Nanoscale

    In this colorful, interactive object, learners examine how materials on the nanoscale compare with those on the macroscale. The focus is on the difference between macroscale and nanoscale gold in both color and melting point.

    Subjects:
    Chemistry
    Keywords:
    Nanoscience
    Resource Type:
    Others
     
  • Others 
    Atomic Weight

    Atomic Weight

    Learners read the definition of atomic weight and obtain the weights of elements by viewing the Periodic Table and charts that list atomic weights by name or symbol.

    Subjects:
    Chemistry
    Keywords:
    Periodic table of the elements Chemical elements Atomic weights
    Resource Type:
    Others
     
  • Others 
    How Pressure Changes Boiling Temperature

    How Pressure Changes Boiling Temperature

    Learners study the effect that pressure has on boiling temperatures. Once a liquid has reached a full boil, additional heat does not raise the liquid’s temperature; however, pressure can vary the boiling point of a liquid. A brief quiz completes the activity.

    Subjects:
    Chemistry
    Keywords:
    Heat -- Transmission Pressure Boiling-points
    Resource Type:
    Others