Monday, December 22, 2008
Mon-Day 2
AP Chem- we elaborated on the causes of ionic bonds in salts and hydroxide bases, polar covalent bonds in molecules, and nonpolar covalent bonds in molecules.
UNLIKE in covalent bonds, the strength of ionic bonds is SOLELY and COMPLETELY determined by the CHARGE DENSITY (charge AND size) of the cations and anions; ionic bonding has NOTHING to do with electronegativity or even Zeff on electrons because electrons are NOT shared in these bonds!
In covalent bonding, the degree of polarity WITHIN/OF the BOND is SOLELY determined by the Zeff and OPEL's of the TWO atoms that SHARE the (bonding) electrons. If there is sufficient difference in Zeff, OPEL's, or both of these factors, the electrons will be unequally shared creating a bond DIPOLE i.e. a polar bond.
We then drew examples of each case.
Bio 6- we elaborated on the physical and chemical processes that occur in each part of the digestive system up to and including the small intestine.
Bio 7/8- we elaborated on the physical and chemical processes that occur in each part of the digestive system up to and including the small intestine.
We then finished up our perspiration lab writeup.
UNLIKE in covalent bonds, the strength of ionic bonds is SOLELY and COMPLETELY determined by the CHARGE DENSITY (charge AND size) of the cations and anions; ionic bonding has NOTHING to do with electronegativity or even Zeff on electrons because electrons are NOT shared in these bonds!
In covalent bonding, the degree of polarity WITHIN/OF the BOND is SOLELY determined by the Zeff and OPEL's of the TWO atoms that SHARE the (bonding) electrons. If there is sufficient difference in Zeff, OPEL's, or both of these factors, the electrons will be unequally shared creating a bond DIPOLE i.e. a polar bond.
We then drew examples of each case.
Bio 6- we elaborated on the physical and chemical processes that occur in each part of the digestive system up to and including the small intestine.
Bio 7/8- we elaborated on the physical and chemical processes that occur in each part of the digestive system up to and including the small intestine.
We then finished up our perspiration lab writeup.
# posted by C @ 10:49 PM 
