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Douglass, Miriam
Remove constraint Creator / Instructor: Douglass, Miriam
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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).
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In this interactive and animated object, students distribute the valence electrons in simple covalent molecules with one central atom. Six rules are followed to show the bonding and nonbonding electrons in Lewis dot structures. The process is well illustrated with eight worked examples and two interactive practice problems.
- Subjects:
- Chemistry
- Keywords:
- Chemical bonds Valence (Theoretical chemistry)
- Resource Type:
- Others
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Learners convert units used to designate pressure. Units for pressure are atm, mm Hg, torr, and pascal.
- Subjects:
- Chemistry
- Keywords:
- Natural gas -- Measurement
- Resource Type:
- Others
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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
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Others
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.
- Subjects:
- Chemistry
- Keywords:
- Chemical reactions Chemical equations
- Resource Type:
- Others
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Others
Learners examine a table containing the names of common cations and anions.
- Subjects:
- Chemistry
- Keywords:
- Ionic structure Ions
- Resource Type:
- Others
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Others
Roman numerals are used to identify the charges on metal cations having multiple oxidation states. Five examples are provided for practice.
- Subjects:
- Chemistry
- Keywords:
- Ionic structure Ions
- Resource Type:
- Others
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Others
Learners examine a table of common polyatomic ions. Eight examples are provided for practice.
- Subjects:
- Chemistry
- Keywords:
- Chemical processes Chemical reactions
- Resource Type:
- Others
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Others
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