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Electronegativity Teacher Resources
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After studying the different aspects of atoms and their reactivity, pupils will find this summary PowerPoint useful for review. Some of the slides are informative with labeled diagrams; others give important vocabulary. Teachers may want to take sections of this slide show to use as a supplement to other chemistry lessons.
Sal introduces students to the ways that atoms "stick together" by bonding. Students see that the process of atomic bonding is what creates molecules. He outlines specific examples of atoms combining through covalent bonding, polar covalent bonding, and metallic bonding. Previous knowledge of how electrons are given away and taken by elements would come in handy when viewing this presentation for the first time.
In the previous video, Sal outlined what happens when a strong acid is put into reaction with another compound. In this presentation, he describes what happens when a weak acid is introduced. Sal explains why Hydrofluoric acid is much weaker than Hydrochloric acid, and shows how the molecules disassociate themselves from the weak acid much more rapidly than they do in a strong acid during a chemical reaction.
Students study the reaction on iron in water, air, and sodium chloride. They create a situation that shows this process and gives them the opportunity to hypothesize what, why, and how. They keep records and do an oral and written presentation on how the results supported or disproved their hypothesis.
Dealing with various types of chemical reactions, this is a note-taking and practice problem worksheet. It has a professional appearance and is well-organized, identifying they type of reaction being taught down the left-hand side of the handout. For each type of reaction, there is a description, format, guidelines, and examples. Use this when introducing your chemistry class to the different types of chemical reactions.
In this drawing Lewis structures worksheet, young scholars read about the 5 steps taken to draw Lewis structures for atoms and molecules. These include identifying the valence electrons, placing pairs of electrons between atoms to be bonded, and moving unshared pairs of electrons so that each atom has eight electrons.
The University of the State of New York has designed a series of exams to be given to high schoolers. This chemistry exam is one of the most comprehensive and well-written that you will ever find. It consists of 84 questions in a variety of styles, including multiple-choice, short answer, problem solving, interpretation of charts and graphs. The content covers every topic within the typical general chemistry curriculum.
High school chemists chart the properties of different types of solids after considering their various intermolecular forces. They examine ionic and metallic bonding and draw electron dot structures for several different compounds. This worksheet is an ideal overview of these concepts and can be used as homework or an assessment.
This clip picks up right where the Khan Academy's Photosynthesis video left off. Chemicals such as hydrogen and compounds such as NADPH are reviewed along with details such as the stroma, thylakoid, lumen, and grana. See the parts of a chloroplast and how it functions to produce energy. The Photosynthesis: Calvin Cycle video takes a look then at the "dark reactions" or light independent reactions.
Ionization energy is the energy required to remove an electron from an atom while in its stable state of being. Students review what an ion is, and how much energy would be required to remove an electron from elements based on their position in the periodic table. Sal effectively uses a graph that has ionization energy on the vertical axis, and an elements atomic number on the horizontal axis to help illustrate ionization energy.
The auto ionization of water into hydrogen and hydroxide ions is the focus of this chemistry video. pH is a chemistry term that most people have heard. "What's the pH level of the water in our pool?" This video shows students, chemically speaking, exactly how water takes on pH ions.