Chemical Bonding - Belle Vernon Area School District

Objective/Warm-Up SWBAT distinguish between ionic, covalent, and metallic substances. Where on the periodic table are metals? Where on the periodic table are nonmetals? Foldable Different types of bonding:

Covalent Ionic Metallic On the outside: put the name and a picture Inside top: put properties Inside bottom: put examples Covalent

Properties of Covalent Compounds

Low melting and boiling points Soft Sharing of electrons Some dissolve in water Do not conduct electricity

NON-METAL WITH NON-METAL Electronegativity difference < 2.0 Examples

Sugar Water Carbon dioxide Oil Wax

Ionic Properties of Ionic Compounds

High melting and boiling points Hard, brittle Transfer of electrons Most dissolve in water Conduct electricity in liquid form or when dissolved in water METAL WITH NON-METAL

Electronegativity difference > 2.0 Examples NaCl (salt) KBr CaCl2 MgSO4

Metallic Properties of Metallic Compounds

Malleable-can be hammered flat Ductile-can be pulled into a wire Luster-shiny A sea of electrons Good conductors of heat and electricity

METAL WITH A METAL Examples

Gold Copper Sodium Calcium Magnesium Platinum

Electrons occupy innermost shell first Exposed electrons in outer shell responsible for bonding Chemical bond

Force of attraction between atoms that holds them together Ionic vs. Covalent Bonds Transfer of electrons

Metal with a non-metal Two non-metals Sharing of electrons Follows the octet rule

Wrap-Up Explain the following cartoon: Perhaps one of you gentlemen wouldnt mind telling me just what outside the window you find so attractive?

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