April 24, 2011
Update your table of contents:
106. 5th 6 Weeks Test Review107. Objectives 2 and 4 Review108. Punnett Square Practice109. Objectives 3 and 5 Review110. 5th 6 Weeks Test
Please DO NOW
Today’s Schedule
Agenda:
1. Comp Book Update
2. Obj 3 and 5 Station Recap
3. Whiteboard Review
4. TAKS Review Booklet
Essential QuestionsWhat do I need to know for the TAKS
test?
Homework: Complete TAKS
booklet
April 24, 2011
Announcement: TAKS test is
Thursday! Come to tutoring
for help finishing TAKS
booklet.
April 24, 2011
To complete TAKS Review Booklet:
• For each objective include AT LEAST 10 facts.
• Facts may include sentences, formulas, labeled pictures, diagrams, or definitions.
• The Review Booklet will be a major grade and is due on Thursday.
Come to tutoring to use the study guide to find additional facts!
TAKS Review Booklet - PreAP
April 24, 2011
To complete TAKS Review Booklet:
• For each objective include AT LEAST 5 facts.
• Facts may include sentences, formulas, labeled pictures, diagrams, or definitions.
• The Review Booklet will be a major grade and is due on Thursday.
Come to tutoring to use the study guide to find additional facts!
TAKS Review Booklet - GL
Elements, Compounds, and Chemical Equations
Counting Atoms and Balancing Equations
1. Counting Subatomic Particles:Use the periodic table• The atomic number is the same as the number
of protons. • The number of protons is the same as the
number of electrons.• The mass number is the protons added to the
neutrons.
Atomic Number = Protons = Electrons (APE)Mass Number = Protons + NeutronsNeutrons = Mass Number - Protons
1. Counting Subatomic Particles:Find the number of protons, neutrons, and
electrons in:
LithiumAtomic Number = Protons = Electrons (APE)Mass Number = Protons + NeutronsNeutrons = Mass Number - Protons
1. Counting Subatomic Particles:Find the number of protons, neutrons, and
electrons in:
LithiumAtomic Number = 3 Mass Number = 7
Protons = 3Neutrons = 4Electrons = 3
1. Counting Subatomic Particles:Find the number of protons, neutrons, and
electrons in:
GoldAtomic Number = Protons = Electrons (APE)Mass Number = Protons + NeutronsNeutrons = Mass Number - Protons
1. Counting Subatomic Particles:Find the number of protons, neutrons, and
electrons in:
Argon
1. Counting Subatomic Particles:Find the number of protons, neutrons, and
electrons in:
Lead
2. Counting Atoms in Chemical Formulas:Examine the subscripts and coefficients
• Subscripts describe the number of that type of atom. They appear after the element symbol, are small, and written hanging below the symbol.
• Coefficients describe the number of molecules present. Coefficients apply to all elements in the molecule. They are written before the formula for the molecule and are large.
4H2OCoefficient: There are 4 molecules of water.
Subscript: There are 2 atoms of Hydrogen in each water molecule.
2. Counting Atoms in Chemical Formulas:Examine the subscripts and coefficients
• Subscripts describe the number of that type of atom. They appear after the element symbol, are small, and written hanging below the symbol.
• Coefficients describe the number of molecules present. Coefficients apply to all elements in the molecule. They are written before the formula for the molecule and are large.
• H2O = 2 hydrogen and 1 Oxygen
2. Counting Atoms in Chemical Formulas:Examine the subscripts and coefficients
• Subscripts describe the number of that type of atom. They appear after the element symbol, are small, and written hanging below the symbol.
• Coefficients describe the number of molecules present. Coefficients apply to all elements in the molecule. They are written before the formula for the molecule and are large.
• 3H2O = 6 Hydrogen and 3 Oxygen
2. Counting Atoms in Chemical Formulas:Examine the subscripts and coefficients
Count and Draw the atoms in the molecule.
NH4
2. Counting Atoms in Chemical Formulas:Examine the subscripts and coefficients
Count and Draw the atoms in the molecule.
NH4 N = Nitrogen = 1H = Hydrogen = 4
2. Counting Atoms in Chemical Formulas:Examine the subscripts and coefficients
Count and Draw the atoms in the molecule.
2NH4
2. Counting Atoms in Chemical Formulas:Examine the subscripts and coefficients
Count and Draw the atoms in the molecule.
NH4
2. Counting Atoms in Chemical Formulas:Examine the subscripts and coefficients
Count the atoms present:C6H12O6
2. Counting Atoms in Chemical Formulas:Examine the subscripts and coefficients
C6H12O6
Carbon – C – 6
Hydrogen – H – 12
Oxygen – O – 6
2. Counting Atoms in Chemical Formulas:Examine the subscripts and coefficients
3C6H12O6
2. Counting Atoms in Chemical Formulas:Examine the subscripts and coefficients
3C6H12O6
Carbon – C – 6 x 3 = 18
Hydrogen – H – 12 x 3 = 36
Oxygen – O – 6 x 3 = 18
2. Counting Atoms in Chemical Formulas:Examine the subscripts and coefficients
2NaC2H3O2
2. Counting Atoms in Chemical Formulas:Examine the subscripts and coefficients
2NaC2H3O2
Sodium - Na – 1 x 2 = 2
Carbon – C – 2 x 2 = 4
Hydrogen – H – 3 x 2 = 6
Oxygen – O – 2 x 2 = 4
2. Counting Atoms in Chemical Formulas:Examine the subscripts and coefficients
KNO3
2. Counting Atoms in Chemical Formulas:Examine the subscripts and coefficients
4KNO3
3. Balancing Equations:Count the atoms in the reactants and the products.
• Count the total number of each type of atom on the reactant (ingredient) side.
• Count the total number of each type of atom in the product (what you make) side
• If the number of each type of atom matches, the equation is balanced. If the numbers do not match the equation is not balanced.
• Equations must be balanced to show that the same atoms that go into a reaction are the atoms that come out, THEY ARE JUST REARRANGED to make new substances.
3. Balancing Equations:Count the atoms in the reactants and the products.
2Cu + O2 2CuOReactants Element Products
Copper
Oxygen
3. Balancing Equations:Count the atoms in the reactants and the products.
2Cu + O2 2CuO
The Equation is Balanced!!!
Reactants Element Products
2 Copper 2
2 Oxygen 2
3. Balancing Equations:Count the atoms in the reactants and the products.
2H2O 3H2 + O2
Reactants Element Products
Hydrogen
Oxygen
3. Balancing Equations:Count the atoms in the reactants and the products.
2H2O 3H2 + O2
Reactants Element Products
4 Hydrogen 6
2 Oxygen 2
3. Balancing Equations:Count the atoms in the reactants and the products.
3Fe + 4H2O 4H2 + Fe3O4
Reactants Element Products
Iron
Hydrogen
Oxygen
3. Balancing Equations:Count the atoms in the reactants and the products.
3Fe + 4H2O 4H2 + Fe3O4
Reactants Element Products
3 Iron 3
8 Hydrogen 8
4 Oxygen 4
3. Balancing Equations:Count the atoms in the reactants and the products.
2Fe2O3 + 3H2 2Fe + 3H2OReactants Element Products
Iron
Oxygen
Hydrogen
3. Balancing Equations:Count the atoms in the reactants and the products.
CaCO3 CaO + CO2
Reactants Element Products
Calcium
Carbon
Oxygen
3. Balancing Equations:Count the atoms in the reactants and the products.
2NaCl 2Na + Cl2
Reactants Element Products
3. Balancing Equations:Count the atoms in the reactants and the products.
CH4 + 2O2 CO2 + 2H2O
3. Balancing Equations:Count the atoms in the reactants and the products.
C5H12 + 6O2 5CO2 + 6H2O
2. Counting Atoms in Chemical Formulas:Examine the subscripts and coefficients
C6H12O6
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