Monday, January 08, 2007
Monday, Day 5
AP: we finished working the Clausius-Clayperon equation by showing it as the equation of a line of slope = - dHvap/R . We then derived the equation to the form that we used on Friday.
We then almost finished the Bonding Unit by reviewing ionic and covalent bonding; we finished with a discussion of metallic bonding as it relates to melting point, electrical conductivity, and malleability/ductility. We will finish the unit on Wednesday as we cover molecular solids, network solids and review induced dipole, dipole-dipole, and hydrogen "bonding" attractions.
Then, it's on to KINETICS! good times.
Honors: we finished our explanation of metallic bonding as it relates to melting point, electrical conductivity, and malleability/ductility. We then moved on to molecular geometry, which we derived from our Lewis dot structures of the molecules. The key is to focus on the number of electron regions around the central atom and to see whether there are nonbonding pairs of electrons on the central atom. Remember, EACH single, double, or triple bond counts as only ONE electron-REGION around the central atom!
Regents: we reviewed and practiced the five cases of molecular geometry: linear (2 or 3-atom molecules with NO central-atom lone pairs of electrons), bent or V-shaped (3-atom molecule with ONE or TWO lone pairs of electrons on the central atom), trigonal PLANAR (4-atom molecule with NO central-atom lone pairs of electrons) or trigonal PYRAMIDAL (4-atom molecule with ONE lone pair of electrons on the central atom) and TETRAHEDRAL (5-atom molecule with NO central-atom lone pairs of electrons).
We then almost finished the Bonding Unit by reviewing ionic and covalent bonding; we finished with a discussion of metallic bonding as it relates to melting point, electrical conductivity, and malleability/ductility. We will finish the unit on Wednesday as we cover molecular solids, network solids and review induced dipole, dipole-dipole, and hydrogen "bonding" attractions.
Then, it's on to KINETICS! good times.
Honors: we finished our explanation of metallic bonding as it relates to melting point, electrical conductivity, and malleability/ductility. We then moved on to molecular geometry, which we derived from our Lewis dot structures of the molecules. The key is to focus on the number of electron regions around the central atom and to see whether there are nonbonding pairs of electrons on the central atom. Remember, EACH single, double, or triple bond counts as only ONE electron-REGION around the central atom!
Regents: we reviewed and practiced the five cases of molecular geometry: linear (2 or 3-atom molecules with NO central-atom lone pairs of electrons), bent or V-shaped (3-atom molecule with ONE or TWO lone pairs of electrons on the central atom), trigonal PLANAR (4-atom molecule with NO central-atom lone pairs of electrons) or trigonal PYRAMIDAL (4-atom molecule with ONE lone pair of electrons on the central atom) and TETRAHEDRAL (5-atom molecule with NO central-atom lone pairs of electrons).
# posted by C @ 12:28 PM 
