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