"I. Introduction to Bonding"
Unit 6 - Chemical Bonding I. Introduction to Bonding I II III IV A. Types of Bonds IONIC COVALENT Bond e- are transferred from e- are shared between Formation metal to nonmetal two nonmetals Type of crystal lattice true molecules Structure Physical State solid liquid or gas Melting high low Point Solubility in yes usually not Water Electrical yes Conductivity (solution or liquid) no Other Properties A. Types of Bonds METALLIC Bond e- are delocalized Formation among metal atoms Type of “electron sea” Structure Physical solid State Melting very high Point Solubility in no Water Electrical yes Conductivity (any form) Other malleable, ductile, Properties lustrous B. Vocabulary Chemical Bond electrical attraction between nuclei and valence e- of neighboring atoms that binds the atoms together bonds form in order to… decrease PE increase stability B. Vocabulary CHEMICAL FORMULA IONIC COVALENT Formula Molecular Unit Formula NaCl CO2 B. Vocabulary COMPOUND more than 2 2 elements elements Binary Ternary Compound Compound NaCl NaNO3 B. Vocabulary ION 1 atom 2 or more atoms Monatomic Polyatomic Ion Ion Na+ NO3- C. Bond Polarity Most bonds are a blend of ionic and covalent characteristics. C. Bond Polarity Nonpolar Covalent Bond e- are shared equally symmetrical e- density usually identical atoms C. Bond Polarity Polar Covalent Bond e- are shared unequally asymmetrical e- density results in partial charges (dipole) + - C. Bond Polarity Nonpolar Polar Ionic View Bonding Animations. C. Bond Polarity Electronegativity Attraction an atom has for a shared pair of electrons. higher e-neg atom - lower e-neg atom + C. Bond Polarity Electronegativity Trend (p. 151) Increases up and to the right. C. Bond Polarity Difference in the elements’ e-negs determines bond type