Tuesday, January 29, 2008
Tues-Day 1
Bio- we took our unit exam and then continued our discussion of the "Making Connections"/Proper Experimental Design Lab, which reinforces your knowledge of using science to:
1. answer questions/ resolve disputes about natural phenomena
2. find the possible relationship or lack thereof between two variables.
Our next unit is a GREAT one: the Immune System.
Outlines will be assigned for Chapter 39 of the text.
Chem 7- we finished our overview/review of intermolecular attractions, noting the multi-step process that is involved in PROVING (not guessing) that a given molecule will have stronger intermolecular attractions, which leads to its higher boiling point, than another molecule. You must draw the Lewis structure, from which one can find the molecular SHAPE and, when considered along with the polarity of the bonds and the lone pairs of electrons, you can determine the molecular polarity or lack thereof. You can then infer the type and strength of the intermolecular attractions BETWEEN the molecules that must be OVERCOME (no BONDS are broken!) in order to separate the molecules into the gas phase (boiling).
We then began our new unit for the 3rd quarter: OrganiC(H) Chemistry.
We noted that ALL organic compounds have AT LEAST one Carbon AND at least one Hydrogen atom PER molecule. That is why carbon dioxide does NOT qualify/is NOT categorized as an organic molecule.
We defined the term ISOMER, which is a compound having the same chemical formula as another compound BUT having a DIFFERENT arrangement of atoms and/or bonds. For example, you will see that there are THREE different molecules that have the formula C5H12; each one is an isomer of the other two.
We began to look at homologous series of HYDROCARBONS, molecules that consist of ONLY carbon and hydrogen (and NO OTHER element).
We looked at the general formulas of alkAnes, alkEnes, and alkYnes. All alkanes have only SINGLE bonds (SATURATED with H), all alkenes have ONE double bond, and all alkynes have ONE triple bond somewhere in the molecule.
Chem 8/9- we reviewed intermolecular attractions, noting the multi-step process that is involved in PROVING (not guessing) that a given molecule will have stronger intermolecular attractions, which leads to its higher boiling point, than another molecule. You must draw the Lewis structure, from which one can find the molecular SHAPE and, when considered along with the polarity of the bonds and the lone pairs of electrons, you can determine the molecular polarity or lack thereof. You can then infer the type and strength of the intermolecular attractions BETWEEN the molecules that must be OVERCOME (no BONDS are broken!) in order to separate the molecules into the gas phase (boiling).
We then began our new unit for the 3rd quarter: OrganiC(H) Chemistry.
We noted that ALL organic compounds have AT LEAST one Carbon AND at least one Hydrogen atom PER molecule. That is why carbon dioxide does NOT qualify/is NOT categorized as an organic molecule.
We defined the term ISOMER, which is a compound having the same chemical formula as another compound BUT having a DIFFERENT arrangement of atoms and/or bonds. For example, you will see that there are THREE different molecules that have the formula C5H12; each one is an isomer of the other two.
We began to look at homologous series of HYDROCARBONS, molecules that consist of ONLY carbon and hydrogen (and NO OTHER element).
We looked at the general formulas of alkAnes, alkEnes, and alkYnes. All alkanes have only SINGLE bonds (SATURATED with H), all alkenes have ONE double bond, and all alkynes have ONE triple bond somewhere in the molecule.
1. answer questions/ resolve disputes about natural phenomena
2. find the possible relationship or lack thereof between two variables.
Our next unit is a GREAT one: the Immune System.
Outlines will be assigned for Chapter 39 of the text.
Chem 7- we finished our overview/review of intermolecular attractions, noting the multi-step process that is involved in PROVING (not guessing) that a given molecule will have stronger intermolecular attractions, which leads to its higher boiling point, than another molecule. You must draw the Lewis structure, from which one can find the molecular SHAPE and, when considered along with the polarity of the bonds and the lone pairs of electrons, you can determine the molecular polarity or lack thereof. You can then infer the type and strength of the intermolecular attractions BETWEEN the molecules that must be OVERCOME (no BONDS are broken!) in order to separate the molecules into the gas phase (boiling).
We then began our new unit for the 3rd quarter: OrganiC(H) Chemistry.
We noted that ALL organic compounds have AT LEAST one Carbon AND at least one Hydrogen atom PER molecule. That is why carbon dioxide does NOT qualify/is NOT categorized as an organic molecule.
We defined the term ISOMER, which is a compound having the same chemical formula as another compound BUT having a DIFFERENT arrangement of atoms and/or bonds. For example, you will see that there are THREE different molecules that have the formula C5H12; each one is an isomer of the other two.
We began to look at homologous series of HYDROCARBONS, molecules that consist of ONLY carbon and hydrogen (and NO OTHER element).
We looked at the general formulas of alkAnes, alkEnes, and alkYnes. All alkanes have only SINGLE bonds (SATURATED with H), all alkenes have ONE double bond, and all alkynes have ONE triple bond somewhere in the molecule.
Chem 8/9- we reviewed intermolecular attractions, noting the multi-step process that is involved in PROVING (not guessing) that a given molecule will have stronger intermolecular attractions, which leads to its higher boiling point, than another molecule. You must draw the Lewis structure, from which one can find the molecular SHAPE and, when considered along with the polarity of the bonds and the lone pairs of electrons, you can determine the molecular polarity or lack thereof. You can then infer the type and strength of the intermolecular attractions BETWEEN the molecules that must be OVERCOME (no BONDS are broken!) in order to separate the molecules into the gas phase (boiling).
We then began our new unit for the 3rd quarter: OrganiC(H) Chemistry.
We noted that ALL organic compounds have AT LEAST one Carbon AND at least one Hydrogen atom PER molecule. That is why carbon dioxide does NOT qualify/is NOT categorized as an organic molecule.
We defined the term ISOMER, which is a compound having the same chemical formula as another compound BUT having a DIFFERENT arrangement of atoms and/or bonds. For example, you will see that there are THREE different molecules that have the formula C5H12; each one is an isomer of the other two.
We began to look at homologous series of HYDROCARBONS, molecules that consist of ONLY carbon and hydrogen (and NO OTHER element).
We looked at the general formulas of alkAnes, alkEnes, and alkYnes. All alkanes have only SINGLE bonds (SATURATED with H), all alkenes have ONE double bond, and all alkynes have ONE triple bond somewhere in the molecule.
# posted by C @ 2:01 PM 
