Learning Objects Authored

• Atomic Symbols, Atomic Numbers, and Mass Numbers

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners read definitions of atomic symbols, atomic numbers, and mass numbers and then answer questions about the number of neutrons, protons, and electrons in select elements.

  Watch Now

  288

  80.8k

  More Less

• Atomic Weight

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  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.

  Watch Now

  137

  3,831

  More Less

• Balancing Oxidation-Reduction Equations

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  In this animated activity, learners examine the terms "half-reaction," "oxidizing agent," and "reducing agent" and follow five interactive examples to balance equations for oxidation-reduction reactions. Three problems are provided as a self-check.

  Watch Now

  259

  27.9k

  More Less

• Boiling Point of a Liquid

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners examine how the boiling point increases with increasing pressure. An example from industry is given.

  Watch Now

  146

  9,469

  More Less

• Calculating Formula Weight and Molecular Weight

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  In this interactive object, learners calculate formula and molecular weights by working through five examples and two problems.

  Watch Now

  107

  44.4k

  More Less

• Calculating Formula Weight and Molecular Weight

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  In this interactive object, learners calculate formula and molecular weights by working through five examples and two problems.

  Watch Now

  47

  1,178

  More Less

• Calculation of Atomic Weight from Isotopic Composition

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners examine the method for calculating the atomic weight of copper from the natural percent composition of each of its two isotopes.

  Watch Now

  242

  12.9k

  More Less

• Chemical Formulas

  By Debbie McClinton, Dr. Martin McClinton

  Students read an explanation of chemical formulas in this animated activity. A quiz completes the object.

  Watch Now

  280

  38.8k

  More Less

• Chemical Formulas

  By Debbie McClinton, Dr. Martin McClinton

  Students read an explanation of chemical formulas in this animated activity. A quiz completes the object.

  Watch Now

  39

  11.6k

  More Less

• Common Types of Oxidation-Reduction Reactions

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners identify combination, decomposition, displacement, and combustion types of redox reactions. They also watch a video clip that demonstrates the reaction of sodium and water.

  Watch Now

  112

  21.0k

  More Less

• Common Types of Oxidation-Reduction Reactions (Screencast)

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners identify combination, decomposition, displacement, and combustion types of redox reactions. They also watch a video clip that demonstrates the reaction of sodium and water.

  Watch Now

  56

  914

  More Less

• Determining Empirical and Molecular Formulas

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners follow a four-step process to determine the empirical formula of a compound from the masses of its constituent elements. The molecular formula is determined in a fifth step using the molecular weight of the compound.

  Watch Now

  85

  6,613

  More Less

• Determining Empirical and Molecular Formulas (Screencast)

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners follow a four-step process to determine the empirical formula of a compound from the masses of its constituent elements. The molecular formula is determined in a fifth step using the molecular weight of the compound.

  Watch Now

  42

  2,742

  More Less

• Electromagnetic Radiation

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  In this animated and interactive object, learners examine the inverse proportionality of wavelength and frequency and their relationship to the speed of light.

  Watch Now

  85

  8,768

  More Less

• Electromagnetic Radiation (Screencast)

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  In this animated and interactive object, learners examine the inverse proportionality of wavelength and frequency and their relationship to the speed of light.

  Watch Now

  46

  1,688

  More Less

• Heat of Fusion and Heat of Vaporization

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners examine graphs and read that the heat of fusion is the heat energy absorbed by one mole of solid as it is converted to liquid, while the heat of vaporization is the heat energy absorbed by one mole of liquid as it is converted to gas.

  Watch Now

  172

  20.5k

  More Less

• Intermolecular Forces

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  In this well-illustrated activity, learners examine the three types of intermolecular forces: dipole-dipole forces, London or Van der Waals forces, and the hydrogen bond. Two interactive questions are included.

  Watch Now

  115

  250.6k

  More Less

• Ions

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  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).

  Watch Now

  149

  24.2k

  More Less

• Isotopes

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  The definition of an isotope is illustrated using the three isotopes of carbon. The three isotopes of hydrogen are discussed as exceptions.

  Watch Now

  158

  8,697

  More Less

• Isotopes

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  The definition of an isotope is illustrated using the three isotopes of carbon. The three isotopes of hydrogen are discussed as exceptions.

  Watch Now

  46

  1,186

  More Less

• Melting Point and Freezing Point

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  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.

  Watch Now

  133

  7,176

  More Less

• Mole Ratios in Chemical Equations

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners use the coefficients in a balanced equation to develop the mole ratios of reactants and products involved in the reaction. Five interactive examples illustrate the method, and students test their knowledge by working four problems.

  Watch Now

  281

  62.7k

  More Less

• Mole Ratios in Chemical Equations

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners use the coefficients in a balanced equation to develop the mole ratios of reactants and products involved in the reaction. Five interactive examples illustrate the method, and students test their knowledge by working four problems.

  Watch Now

  97

  12.6k

  More Less

• Naming Binary Ionic Compounds Containing Fixed Oxidation State Cations

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners examine a table containing the names of common cations and anions. They then check their knowledge by answering a series of questions.

  Watch Now

  245

  12.4k

  More Less

• Naming Binary Ionic Compounds Containing Fixed Oxidation State Cations

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners examine a table containing the names of common cations and anions.

  Watch Now

  219

  3,336

  More Less

• Naming Binary Ionic Compounds Containing Variable Oxidation State Cations

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Roman numerals are used to identify the charges on metal cations having multiple oxidation states. Five examples are provided for practice.

  Watch Now

  203

  17.8k

  More Less

• Naming Binary Ionic Compounds Containing Variable Oxidation State Cations (Screencast)

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Roman numerals are used to identify the charges on metal cations having multiple oxidation states. Five examples are provided for practice.

  Watch Now

  120

  3,343

  More Less

• Naming Compounds Containing Polyatomic Ions

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners examine a table of common polyatomic ions. Eight examples are provided for practice.

  Watch Now

  291

  26.9k

  More Less

• Naming Compounds Containing Polyatomic Ions

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners examine a table of common polyatomic ions. Eight examples are provided for practice.

  Watch Now

  67

  2,614

  More Less

• Oxidation Numbers

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  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.

  Watch Now

  233

  28.7k

  More Less

• Oxidation States of Ions

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners examine the periodic table to identify metallic elements that have either fixed or variable oxidation states.

  Watch Now

  117

  3,971

  More Less

• Oxidation-Reduction Reactions

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners examine the meaning of oxidation, reduction, and half-reaction, and watch a film showing the deposition of copper metal from the reduction of copper (II) ion by aluminum. A brief quiz completes the activity.

  Watch Now

  214

  24.3k

  More Less

• Percent Composition of Compounds

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners examine the method used to calculate the mass percent of an element in a compound. Three examples and one problem illustrate the method.

  Watch Now

  181

  12.2k

  More Less

• Percent Composition of Compounds (Screencast)

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners examine the method used to calculate the mass percent of an element in a compound. Three examples and one problem illustrate the method.

  Watch Now

  47

  996

  More Less

• Phase Diagrams

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners examine phase diagrams that show the phases of solid, liquid, and gas as well as the triple point and critical point.

  Watch Now

  244

  23.1k

  More Less

• Phase Transitions

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners examine how melting, vaporization, and sublimation require energy input while freezing and condensation release energy.

  Watch Now

  257

  17.6k

  More Less

• Product Yields in Chemical Reactions

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners examine the meaning of theoretical yield, actual yield, and percent yield. They test their knowledge by solving two problems.

  Watch Now

  85

  11.2k

  More Less

• Product Yields in Chemical Reactions (Screencast)

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners examine the meaning of theoretical yield, actual yield, and percent yield. They test their knowledge by solving two problems.

  Watch Now

  36

  523

  More Less

• The Effect of Temperature on the Vapor Pressure of a Liquid

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners examine how vapor pressure is calculated. The vapor pressure of a liquid increases with increasing temperature. If the heat of vaporization and the vapor pressure at one temperature are known, the vapor pressure at a second temperature can be calculated.

  Watch Now

  182

  26.7k

  More Less

• The Limiting Reagent in Chemical Reactions

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  In this interactive object, learners determine the limiting reagent and the excess reagent in chemical reactions. Learners test their knowledge by solving three problems.

  Watch Now

  227

  11.1k

  More Less

• The Limiting Reagent in Chemical Reactions

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  In this interactive object, learners determine the limiting reagent and the excess reagent in chemical reactions. Learners test their knowledge by solving three problems.

  Watch Now

  52

  1,368

  More Less

• The Mole and Avogadro's Number

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Learners examine how chemists use moles to "count" atoms by weight. Examples are given.

  Watch Now

  324

  14.5k

  More Less

• The Solid State

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  In this well-illustrated object, learners examine the structures and properties of the four types of solids: molecular, metallic, ionic, and covalent network. Five interactive questions are provided.

  Watch Now

  150

  11.6k

  More Less

• Types of Elements in the Periodic Table and Their Properties

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Students review the positions of metals, metalloids, and nonmetals in the Periodic Table and the general characteristics of each. A quiz completes the object.

  Watch Now

  321

  91.1k

  More Less

• Types of Elements in the Periodic Table and Their Properties (Screencast)

  By Debbie McClinton, Dr. Martin McClinton

  In this screencast, we review the positions of metals, metalloids, and nonmetals in the Periodic Table and the general characteristics of each.

  Watch Now

  248

  5,679

  More Less

• Vapor Pressure

  By Debbie McClinton, Dr. Miriam Douglass, Dr. Martin McClinton

  Vapor pressure is the pressure exerted by molecules in the gas phase in equilibrium with a liquid or a solid. Two examples are used to illustrate vapor pressure: the drying of clothes and the evaporation of ice.

  Watch Now

  226

  8,818

  More Less