th
th
5 and 6 Grade Science
Chemistry Review 2
City Academy Science
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Name: ________________________________________________________
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sentences
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DIRECTIONS: Below is a cumulative review of the chemistry unit. All questions are to be answered
using complete sentences. Reviews completed and corrected entitle students to use their notes for
the last five minutes of the quiz. The review is due Thursday, September 15 with a quiz scheduled for
Friday, September 16. Students are to study for their quiz 20 minutes each night prior to the quiz
using their notes, handouts and reviews. . All of these materials can be found on the science
classroom page under the Parent Resources pull-down menu at www.cityacademyschool.org.
LABEL: Label each of the illustrations below.
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SHORT ANSWER: Answer each of the following questions using proper terms and complete sentences.
1. How is an organic compound different from an inorganic compound? How is a polymer different from a monomer?
2. What is all matter made of? What is the simplest form of an element? What are the three subatomic particles and
how are they charged?
3. What is a valence electron? Which energy level is carbon’s outer energy level? How many valence electrons
does an atom of carbon have? How many more possible electrons could carbon hold?
4. What does the law of the conservation of matter state? How is a reactant different from a product? How doe you
determine if a chemical equation is balanced?
5. What does the atomic number tell you about an atom? What does the atomic mass tell you about an atom? What
do you need to do with these two numbers to determine the number of neutrons in an atom?
6. Explain how a chemical property is observed? What is a chemical reaction? What occurs to the molecules of
reactants to make them products?
7. How does an atom achieve stability? Why is the nucleus not involved in achieving stability? How might the
formation of a molecule be involved in stability?
8. How is a covalent bond different from an ionic bond? What is an ion? Why do ions form bonds with each other?
9. What are the three types of molecular matter? How is an element different from a compound?
CHEMICAL BONDING: Look at the graphics below and answer the questions that follow. Use complete sentences.
1. What type of bond is represented in the molecule below? What is occurring that makes this type of bond? Why
would this molecule be considered a compound that is an organic monomer?
2. What type of bond is represented in the molecule below? What is occurring that makes this type of bond? What
type of atom are sodium and oxygen since they are charged? What had to happen to sodium to become positive and
oxygen to become negative? Why would this molecule be considered a compound that is an inorganic monomer?
BALANCED CHEMICAL EQUATIONS: Below are a number of chemical equations that need to be determined if they
are balanced.
a. C2H4 + 2O2 ! 2CO2 + 2H2O
C=
H=
O=
! C=
Yes or No
H=
O=
b. CH4 + 4Cl2 ! CCl4 + 4HCl
Yes or No
c. Mg + H2SO4 ! MgSO4 + H2
Yes or No
d. 4NH2 + 5O2 ! 4NO + 6H2O
Yes or No
e. 3O2 + CS2 ! CO2 + 2SO2
Yes or No
MOLECULAR MODELS: Using the bond-line formula for drawing molecular models, draw molecular models for both
of the chemical formulas below.
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C2H3O2N
C3H4O2
ATOMIC MODELS: Fill in the missing information that should be contained in the periodic table squares below and
complete the atomic model for each element using the information you include in the squares.
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