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Name ____________________________________________________________ Date __________________ Ionic Compounds and Metals Section 2 Ionic Bonds and Ionic Compounds Skim Section 2 of your text. Write three questions that come to mind from reading the headings and the illustration captions. 1. _____________________________________________________ 2. _____________________________________________________ 3. _____________________________________________________ Use your text to define each term. ionic bond ________________________________________________________ ________________________________________________________ ionic compound ________________________________________________________ crystal lattice ________________________________________________________ electrolyte ________________________________________________________ ________________________________________________________ lattice energy ________________________________________________________ ________________________________________________________ Chemistry: Matter and Change 85 Science Notebook Name ____________________________________________________________ Date __________________ Section 2 Ionic Bonds and Ionic Compounds (continued) Formation of an Ionic Bond Use with pages 210–212. Solve Read pages 211–212 in your text. You Try It Problem Describe the formation of an ionic compound from the elements boron and selenium. 1. Analyze the Problem Known: the electron configurations of the given elements Unknown: ________________________________________ the number of valence electrons for each neutral atom ________________________________________ ________________________________________ 2. Solve for the Unknown Determine how many electrons need to be removed from boron and how many electrons need to be added to selenium to form noble gas configurations. __________________________________________________ __________________________________________________ __________________________________________________ Determine how many boron atoms and how many selenium atoms must be present for the total number of electrons exchanged between the two elements to be equal. __________________________________________________ __________________________________________________ __________________________________________________ 3. Evaluate the Answer The overall charge on one unit of this compound is zero. boron ions (3/boron ion) (3) Chemistry: Matter and Change ( 86 selenide ions ( /selenide ion) )0 Science Notebook Name ____________________________________________________________ Date __________________ Section 2 Ionic Bonds and Ionic Compounds (continued) Properties of Ionic Compounds Analyze the relationship between the lattice energy of an ionic compound and the force of attraction. _______________________________________________________ Use with pages 212–217. _______________________________________________________ _______________________________________________________ Describe the relationship between the size of the ions in a compound and the compound’s lattice energy. _______________________________________________________ _______________________________________________________ _______________________________________________________ Explain the relationship between lattice energy and the charge of the ion. _______________________________________________________ _______________________________________________________ Organize the following ionic compounds from those with the least negative lattice energy to those with the most negative lattice energy. Chemistry: Matter and Change ____ LiCl ____ BeS ____ LiBr ____ BeO ____ BeCl2 ____ RbBr ____ CsI ____ SrCl2 ____ CsBr 87 Science Notebook