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Objectives. Predict the formulas of ionic compounds Describe the structures of ionic compounds 3. Compare the size of an atom to the size of its ion. A. Stable Electron Configurations and Charges on Ions. A. Stable Electron Configurations and Charges on Ions.
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Objectives • Predict the formulas of ionic compounds • Describe the structures of ionic compounds 3. Compare the size of an atom to the size of its ion
A. Stable Electron Configurations and Charges on Ions • Atoms in stable compounds usually have a noble gas electron configuration • Metals lose electrons to reach noble gas configuration • Nonmetals gain electrons to reach noble gas configuration
A. Stable Electron Configurations and Charges on Ions • Predicting Formulas of Ionic compounds • Chemical compounds are always electrically neutral
B. Ionic bonding and Structures of Ionic Compounds • Ions are packed together to maximize the attractions between ions • Structures of Ionic Compounds
B. Ionic bonding and Structures of Ionic Compounds • Cations are always smaller than the parent atom • Structures of Ionic Compounds • Anions are always larger than the parent atom
B. Ionic bonding and Structures of Ionic Compounds • Polyatomic ions work in the same way as simple ions • The covalent bonds hold the polyatomic ion together so it behaves as a unit • Ionic Compounds Containing Polyatomic Ions