Objective/Warm-Up

• SWBAT distinguish between ionic, covalent, and metallic substances.

• Where on the periodic table are metals?• Where on the periodic table are non-

metals?

Foldable

• Different types of bonding:• Covalent• Ionic• Metallic

On the outside: put the name and a pictureInside top: put propertiesInside 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 BondsTransfer of electrons

Sharing of electrons

Metal with a non-metal

Two non-metalsFollows the octet rule

Wrap-Up

• Explain the following cartoon:

“Perhaps one of you gentlemen wouldn’t mind telling me just what outside the window you find so attractive…?”