Tuesday, October 7, 2008
Tues-Day 2
AP Chem- Chapter 7 hw solutions will be posted shortly.
As a time-saver on tomorrow's test, you may want to write out the following ONE TIME (at the beginning of ONE of your relevant explanation answers) to cover your basic CAUSES of any of your explanations:
1. Coulomb's Law states that the greater the quantity of opposite charges, the greater the force of attraction. The greater the quantity of same charges, the greater the force of repulsion.
The law also states that, the FARther the distance between opposite charges, the LESSER the force of attraction. The FARther the distance between same charges, the LESSER the force of repulsion.
2. Zeff is effective nuclear charge: it is the nuclear charge minus the number of shielding/inner Principal Energy Level (PEL) electrons (Zeff = Z-S) . According to Coulomb's Law, the greater the Zeff on an electron, the greater the attraction between the electron and the nucleus.
3. OPEL's: are occupied principal energy levels. Via Coulomb's Law, the greater the number of OPEL's, the FARther away the valence electrons are, therefore, the LESSER the attraction of those electrons to the nucleus.
That should cover the BEGINNING of any explanation. You can then REFER to the above in any explanation answer by writing: "as stated in 1(or 2 or 3)".
Hope this helps and saves you some time.
Bio 6- we finished our discussion of the structure and function of organelles that are common to most eukaryotic cells. We then compared and contrasted simple, small, primitive prokaryotic cells with larger, more complex, eukaryotic cells.
Bio 7/8- we finished our discussion of the structure and function of organelles that are common to most eukaryotic cells. We began to compare prokaryotic and eukaryotic cells.
We must also do the unit 2 test review tomorrow.
We then finished our pH lab discussion and began our new lab on plant and animal cells, which we will finish on Friday.
As a time-saver on tomorrow's test, you may want to write out the following ONE TIME (at the beginning of ONE of your relevant explanation answers) to cover your basic CAUSES of any of your explanations:
1. Coulomb's Law states that the greater the quantity of opposite charges, the greater the force of attraction. The greater the quantity of same charges, the greater the force of repulsion.
The law also states that, the FARther the distance between opposite charges, the LESSER the force of attraction. The FARther the distance between same charges, the LESSER the force of repulsion.
2. Zeff is effective nuclear charge: it is the nuclear charge minus the number of shielding/inner Principal Energy Level (PEL) electrons (Zeff = Z-S) . According to Coulomb's Law, the greater the Zeff on an electron, the greater the attraction between the electron and the nucleus.
3. OPEL's: are occupied principal energy levels. Via Coulomb's Law, the greater the number of OPEL's, the FARther away the valence electrons are, therefore, the LESSER the attraction of those electrons to the nucleus.
That should cover the BEGINNING of any explanation. You can then REFER to the above in any explanation answer by writing: "as stated in 1(or 2 or 3)".
Hope this helps and saves you some time.
Bio 6- we finished our discussion of the structure and function of organelles that are common to most eukaryotic cells. We then compared and contrasted simple, small, primitive prokaryotic cells with larger, more complex, eukaryotic cells.
Bio 7/8- we finished our discussion of the structure and function of organelles that are common to most eukaryotic cells. We began to compare prokaryotic and eukaryotic cells.
We must also do the unit 2 test review tomorrow.
We then finished our pH lab discussion and began our new lab on plant and animal cells, which we will finish on Friday.
# posted by C @ 2:07 PM 
