objective/warm-up swbat distinguish between ionic, covalent, and metallic substances. where on the...
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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?
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Foldable
• Different types of bonding:• Covalent• Ionic• Metallic
On the outside: put the name and a pictureInside top: put propertiesInside bottom: put examples
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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
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Examples
• Sugar• Water• Carbon dioxide• Oil• Wax
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Ionic
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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
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Examples
• NaCl (salt)• KBr
• CaCl2• MgSO4
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Metallic
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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
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Examples
• Gold• Copper• Sodium• Calcium• Magnesium• Platinum
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Electrons occupy innermost shell first– Exposed electrons in outer shell
responsible for bonding
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Chemical bond– Force of attraction between atoms that
holds them together
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Ionic vs. Covalent BondsTransfer of electrons
Sharing of electrons
Metal with a non-metal
Two non-metalsFollows the octet rule
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Wrap-Up
• Explain the following cartoon:
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“Perhaps one of you gentlemen wouldn’t mind telling me just what outside the window you find so attractive…?”
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