Then they practice the concepts on worksheets and by constructing models of compounds with ionic and covalent bonds. Students are presented with various examples of ionic and covalent bonding. Then the octet rule is introduced so that students see how atoms fill their energy levels when they bond together. The lesson begins with an explanation of how to use the periodic table to determine whether elements will join to form ionic or covalent bonds. Students who may be going beyond the standards can diagram and build models of more complex molecules (e.g., O 3, which has two double bonds between 3 oxygen atoms). This lesson can be tailored by providing additional examples and guiding students through the solutions for the practice problems. Students express their understanding of the concepts by drawing diagrams and building models. Students revisit the concepts through practice problems on worksheets and in a graphic organizer that compares ionic and covalent bonding. They diagram them in several ways, as well as create models of the molecules. Students learn various characteristics of ionic and covalent bonds. The class also defines atom and molecule to provide a foundation for the lesson. This activity gets them thinking about the position of electrons in relation to the nucleus. The lesson begins by having students diagram the structure of an atom, based on what they already know. This lesson on ionic and covalent bonding includes many examples for students, as well as guided and independent practice. Scaffolding, Active Engagement, Modeling, Explicit Instruction W: bag containing slips of paper, each with a different common covalent bond (one slip per pair of students).bag containing slips of paper, each with a different common ionic bond (one slip per pair of students).a paper bag per pair of students, containing these items: two large gumdrops (different colors) fourteen each of two different colors of small gumdrops (total 28 small gumdrops) wooden skewers broken into the following sizes: 4 one-inch pieces, 16 three-inch pieces, and 4 five-inch pieces.
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