new area of focus: chemical bonding copyright © 2010 ryan p. murphy
TRANSCRIPT
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• New Area of focus: Chemical Bonding
Copyright © 2010 Ryan P. Murphy
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Copyright © 2010 Ryan P. Murphy
• Chemical bonds: the attraction that holds atoms together as a result of rearranging their electrons.
• Atoms try to have 8 valence electrons (or 2 for H and He),
so they will either increase their number or decrease it to get closer to 8. This makes them chemically bonded to other atoms.
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• Ionic, Covalent, Metallic–Covalent – Share electrons–Ionic – Gain or lose electrons (transfer)
–Metallic- Many free electrons
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• Ionic, Covalent, Metallic–Covalent – Share electrons–Ionic – Gain or lose electrons (transfer)
–Metallic- Many free electrons
Copyright © 2010 Ryan P. Murphy
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“My name is Bond.”
Copyright © 2010 Ryan P. Murphy
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“Covalent Bond.”
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• Ionic, Covalent, Metallic–Covalent – Share electrons–Ionic – Gain or lose electrons (transfer)
–Metallic- Many free electrons
Copyright © 2010 Ryan P. Murphy
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• Ionic, Covalent, Metallic–Covalent – Share electrons–Ionic – Gain or lose electrons (transfer)
–Metallic- Many free electrons
Copyright © 2010 Ryan P. Murphy
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Covalent bonding occurs by a sharing of valence electrons
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Covalent bonding occurs by a sharing of valence electrons (Strongest) (SPONCH).
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Ionic bonding (+/-) Bonds created by the attraction of opposite charges.
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“Ionic Please.” “Transferred.” “Not shared.”
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• Ionization: The process of removing electrons from an atom to form ions.
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• Ionic - One atom strips electron from the other so both are now stable. Held then by + / - charge
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• Ionic - One atom strips electron from the other so both are now stable. Held then by + / - charge
Copyright © 2010 Ryan P. Murphy
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• Ionic - One atom strips electron from the other so both are now stable. Held then by + / - charge
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Ionic Bonding: Forms crystal lattice.
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• Metallic bonding: The bonding between atoms within metals. The sharing of many free electrons.
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Most metal atoms bond with other types of metal to form alloys- a mixture of two or more metals.
Metal atoms lose their valence electrons and become positively charged ions.
The free electrons float around the atoms in a “sea of electrons”. The electrons are attracted to the positively charged atoms.
The” sea of electrons” can explain the malleability, luster, high electrical conductivity, and high thermal conductivity of metals.
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• Remember: • Covalent – Sharing an Electron many of
the SPONCH elements.
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• Remember: • Covalent – Sharing an Electron many of
the SPONCH elements.• Ionic – Opposite charges + / -
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• Remember: • Covalent – Sharing an Electron many of
the SPONCH elements.• Ionic – Opposite charges + / -• Metallic – Many free floating electrons
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• Quiz Wiz: Label as either…• Covalent, Ionic, or Metallic 1-10
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• Bonus: Name the actor and movie character.
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• Answers! Quiz Wiz: Label as either, Covalent, Ionic, or Metallic 1-10
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• Bonus: Name the actor and movie character.
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• Bonus: Name the actor and movie character. Sean Connery as James Bond