Tuesday, August 23, 2011

Scope and Sequence for 2nd Quarter 2011-2012

UNIT 2: STRUCTURE OF MATTER

Content Standard:
The learner demonstrates understanding on the structure of matter.
                 
Performance Standard:
 Learners, perform in groups, advocate the importance of materials properties on different products.

  Performance Task:
Poster Board Presentation on the  influence of material properties on product

  Topics:
Quantum Mechanical Model
Quantum Numbers
Electron Configuration

UNIT 3: PERIODIC BEHAVIOR OF ELEMENTS

Content Standard:
The learners demonstrate understanding of the periodicity of the physical and chemical properties of elements and relate it to its atomic structure.
                 
Performance Standard:
 Learners, working individually, manifest understanding on the different properties and uses of elements in everyday life.

  Performance Task:
Web Design showing group of elements with their corresponding properties and uses.

  Topics:
The Development of the Periodic Table and The Periodic Law
Arrangement of the Elements in the Periodic Table:
Quantun Numbers, Electron Configuration and Periodic Table
Periodic Trends: Atomic Size and Ionic Size
Ionization Energy / Electron Affinity / Electronegativity
Enrichment on Periodic Arrangement and Trends
Uses of Elements

UNIT 4: BONDING AND MOLECULAR STRUCTURE

Content Standard:
            The learners demonstrate understanding on chemical bonding and molecular structure.
 
Performance Standard:
 Learners, working in groups, integrate their understanding on chemical bonding and molecular structure to find 
 solutions in the different changes around us.

  Mini-Performance Task:
Laboratory Investigation:
     Writing procedures on how to change one substance into another substance. 

  Topics:
Ionic Bonding: Octet Rule and Electron Dot Structure
Ionic Bond Formation / Types of Ions / Binary Ionic Compounds
Naming and Writing Ionic Compounds
Formation of Covalent Bond
Properties of Covalent Bonds: Electronegativity, Polar and Nonpolar
Naming and Writing  Covalent Compounds
Enrichment on Naming and Writing Ionic and Covalent Compounds
Properties of Ionic and Covalent Compounds
VSEPR/Molecular Geometry: Determining Geometry of Molecules
Lewis Structure, Formal Charge, VSEPR Theory
Hybridization and Hybrid Orbitals
Polarity of Molecules: Intermolecular Forces of Attraction
Molecular Models

UNIT 5: CONSERVATION OF MATTER AND STOICHIOMETRY

Content Standard:
              The learners demonstrate understanding on the conservation of matter and stoichiometry.

Performance Standard:
 Learners, perform in groups, conduct scientific investigation on predicting and verifying products using scientific method.

  Mini-Performance Task:
Laboratory Investigation: Predicting and Verifying Products

  Topics:
Nature of Chemical Reactions
Classifying Chemical Reactions
Balancing Chemical Equations
Completing Chemical Reactions
                                      

Textbook:
Chemistry, Connection To Our Changing World by Le May , et al, Prentice Hall

References:
1.       Chemistry by Wilbraham, Staley, Matta and Walterman, Prentice Hall
2.       Chemistry "O" Level by JGR Brigss
3.       Fun in Teaching Chemistry by JICA-JOVC and RSTC
4.       Science Chemistry Concepts and Application, Glencoe
5.       Chemistry, A Modular Approach by Padolina,C



Wednesday, August 10, 2011

2nd Quarter Topic Outline

Hello chem lovers! Second quarter is coming and there's no stopping it. Get your battered heavily chemistry books ready and mark the topics below:

1. Quantum mechanical model of the atom.
2. Electron configuration
3. The periodic table
4. Periodic trends
5. Bonding
6. Naming of compounds
7. Lewis structure
8. VSEPR 
9. Chemical reactions

A detailed topic outline will be posted on the Ateneo de Davao High School website... better check it out.


Wednesday, August 3, 2011

1st Quarter Reviewer: S.Y. 2011-2012 Ver 3

Hi there. Chemistry exam is hours away... chill, relax, chillax, whatever. Here's another reviewer to help you calm your nerves.

Time Frame: 30 minutes
Source:http://cwx.prenhall.com/bookbind/pubbooks/hill/chapter1/multiple1/deluxe-content.html





1.  

Which of the following is not an example of matter?

air

iron

heat

water

wood


2.  

A person tries to start his car in the morning and it does not start. He thinks that the car may be out of gas. His idea concerning why the car does not start is an example of:

a hypothesis

an experiment

law

theory

data


3.  

Which of the following represents a change of mass?

An astronaut is in orbit about the earth and is in weightless condition.

An astronaut is walking on the moon and can jump great distances.

An astronaut takes off in a rocket ship and feels the effects of acceleration.

The astronaut is in a rapidly dropping elevator at the Space Center.

An astronaut goes on a diet and loses five kilograms.


4.  

Which of the following is a homogeneous mixture?

helium gas used to fill a balloon

high octane gasoline

Italian salad dressing

nails in water

sodium chloride


5.  














6.  

Convert 50.0 km to m.

5.00 x 103 m

5 x 104 m

5.00 x 104 m

20.0 m

5.00 x 10-2 m


7.  

Convert 87.6 µg to kg.

8.76 x 104 kg

8.76 x 10-8 kg

8.76 x 108 kg

8.76 x 10-5 kg

0.0876 kg


8.  

Convert 0.0962 km/min to m/s.

9.62 m/s

1.60 m/s

1.60 x 10-3 m/s

2.67 x 10 -2 m/s

5.76 x 103 m/s


9.  

Convert 10.1 meters per second to miles per hour.

6.29 x 10-3 mi/h

1.43 x 103 mi/h

36.4 mi/h

377 mi/h

22.6 mi/h


10.  

Convert 87.4 cm² to m².

8.74 x 10-3

8.74 x 10³m²

8.74 x 10+5

0.874 m²

8.74 x 10-5


11.  

Convert 46.4 m³ to liters.

46.4 L

4.64 x 104 L

4.64 L

4.64 x 10² L

4.64 x 10-8 L


12.  

Which of the following is the greatest length?

a 1.5 m chain

a 1 dm pencil

a 5.0 cm gold chain

2500 grams of sugar

a yardstick


13.  

How many significant figures are there in this measured quantity?
0.040930

3

4

6

5

7


14.  

How many significant figures are there in this measured quantity?
5.010 x 10³

5

2

6

4

3


15.  

Express the following measured quantity in exponential notation.
2800 meters

28.00 x 10² m

2.8 x 10³ m

2.80 x 10³ m

2.800 x 10³ m

2.800 x 10-3 m


16.  

Express the following number in exponential notation rounded to three significant figures.
87,660

8.77 x 10-4

8.77 x 104

0.877 x 105

876.60 x 102

8.76 x 104


17.  

Perform the indicated operation and give an answer with the proper number of significant figures.
48.2 m + 3.87 m + 48.4394 m

101 m

100.4 m

100.51 m

100.5094 m

100.5 m


18.  

Perform the indicated operation and give an answer with the proper number of significant figures.
451 g - 15.46 g

466 g

435.54 g

435.5 g

4.4 x 102 g

436 g


19.  

Perform the indicated operations and give an answer with the proper number of significant figures.
(33.58 x 1.007) / .00705

4796

4800

4796.462411

4.8 x 103

4.80 x 103


20.  

Perform the indicated operations and give an answer with the proper number of significant figures.
(2.023 - 1.8 x 10-3) / 1.05 x 104

1.92495 x 10-4

2.02

1.9 x 10-4

1.92 x 10-4

0.212


21.  

What is the density of a salt solution if 50.0 mL has a mass of 57.0 g?

1.14 g/mL

2.85 x 103 g/mL

3.51 x 10-4 g/mL

0.877 mL/g

1.14 g/L


22.  

What is the mass, in kg, of 2.75 liters of the liquid glycerol, which has a density of 1.26 g/mL?

0.458 kg

2.18 kg

3.47 x 103 kg

3.47 kg

0.00347 kg


23.  

What is the volume of 5.79 mg of gold? The density of gold is 19.3 g/cm³.

3,333 cm³

0.112 cm³

3.00cm³

3 x 10-4 cm³

3.00 x 10-4 cm³


24.  

A rectangular block measures 3.00 cm by 1.25 cm by 1.50 cm and has a mass of 28.12 g. What is the density?

9.37 g/cm³

6.25 g/cm³

7.50 g/cm³

5.00 g/cm³

0.200 g/cm³


25.  

Dust from air that is not significantly polluted is deposited ("dustfall") at a typical rate of 10 tons/mi² per month. What is this dustfall expressed in mg/m² per hour? Assume a month of 30 days.

2.44 x 10-3 mg / m²·hr

4.87 mg / m²·hr

4.87 x 10-3 mg / m²·hr

12.6 mg / m²·hr

7.83 mg / m²·hr

Tuesday, August 2, 2011

1st Quarter Reviewer: S.Y. 2011-2012 Ver 2

Time Frame: 10 mins

Source: http://www.avon-chemistry.com/nuclear_practice.htm

Hi everyone! This is a quick test for chapters 3 and 4 of our textbook. Have fun.

MULTIPLE CHOICE:

1.      Cathode rays are:


        
  A  
negatively charged particles


        
  B  
positively charged particles


        
  C  
nuclei of a helium atom


        
  D  
fast moving neutrons

2.     The neutral atoms of all of the isotopes of the same element have:



        
  A  
the same mass numbers


        
  B  
equal numbers of neutrons


        
  C  
the same number of electrons


        
  D  
different number of protons

3.      Which statement is true about an isotope?


        
  A  
There can be more than one type of isotope for an element.


        
  B  
All isotopes for an element has the same number of protons and the same mass number.


        
  C  
Isotopes can have different numbers of protons.


        
  D  
All isotopes are not radioactive.

4.      How many electrons are in an oxygen atom?
 

        
  A  
2


        
  B  
6


        
  C  
8


        
  D  
10

5.  Copper has an atomic mass of 63.5 grams per mole. Why is the atomic mass NOT a whole number?
 

        
  A  
All copper atoms have identical chemical properties.


        
  B  
The fractional number results from the fact that protons and neutrons have different masses.


        
  C  
Every copper atom has an atomic mass of 63.5 amu.


        
  D  
There are at least two naturally occurring isotopes of copper.

6.      Which symbol represents an atom that contains the largest number of neutrons?

 

        
  A  
U-235


        
  B  
Pa-231


        
  C  
Np-239


        
  D  
Pu-240


        
  E  
U-239

  1. The number of protons in fluorine-23 is 

        
  A  
6


        
  B  
8


        
  C  
9


        
  D  
14


        
  E  
23

  1. Find the average mass of an element if the relative amounts are as follows:
    Isotopic Mass: Percentage:
    75 amu ----------- 2.3%
    77 amu ----------- 15.7 %
    78 amu ----------- 4.5 %
    80 amu ----------- 7.1 %
    81 amu ----------- 70.4 %
     

        
  A  
77.25 amu


        
  B  
78.01 amu


        
  C  
79.09 amu


        
  D  
80.03 amu


        
  E  
81.09 amu

  1. Which of the following is NOT true about chemical reactions? 

        
  A  
After a chemical reaction, the protons and neutrons within the atom have not changed.


        
  B  
After a chemical reaction, there are new bonds formed while others bonds were broken.


        
  C  
After a chemical reaction, an electron may enter the nucleus and change a proton to a neutron.


        
  D  
After a chemical reaction, the boiling points and melting points of the new products are different.

  1. How many protons, neutrons, and electrons are in one atom of Pb-212 (atomic number 82)?


        
  A  
212 p+, 82 n0, 212 e-


        
  B  
82 p+, 212 n0, 212 e-


        
  C  
82 p+, 212 n0, 82 e-


        
  D  
82 p+, 82 n0, 212 e-


        
  E  
none of the above are correct




Did you have fun? Here are the answers!

1. a
2. c
3. a
4. c
5. d
6. e
7. d
8. d
9. c
10. e