Download Classification of

Chemistry Unit Review
Name _______________________
1. Write the term next to its definition. Choose from these terms:
atom
chemistry
compound
element
heterogeneous
homogeneous
mixture
period
a)
b)
c)
d)
e)
f)
g)
h)
i)
group
_______period_______________________ - row on the periodic table
________group______________________ - column on the periodic table
_________atom_____________________ - smallest particle of matter
__________element____________________ - simplest form of matter
_____________compound__________ - 2 or more elements chemically combined
__________mixture_______________ - 2 or more substances physically combined
_________heterogeneous______________ - mixture with individual parts visible
______homogeneous_______________ - mixture that looks the same throughout
____chemistry________________ - the study of matter
2. What is Mendeleev known for? _______designing the Periodic Table________
3. How is the periodic table organized? from left to right, increasing by atomic number
(Other answers: grouped into columns by similar characteristics; metals from left to
center, non-metals on the right, metalloids on the zig-zag staircase)
4. Fill out the missing information in the table shown below:
Atomic #
Element
Symbol
Group
Period
79
gold
Au
11
6
80
mercury
Hg
12
6
8
oxygen
O
16
2
5. Use the table to answer the questions below.
Substance
water
wood
ice
aluminum
Top
Bottom
Density (g/mL)
1.00
0.40
0.92
2.70
Floats in water __wood, ice_____________________
Sinks in water _____aluminum___________________
Most dense __________aluminum_________________
Least dense ________wood_____________________
The 4 substances from the table are mixed
together. Fill in the boxes to show how they
would layer from top to bottom.
6. Examine the pictures of mixtures shown below. Place a checkmark in the
correct space after deciding if each mixture is heterogeneous or homogeneous.
Pepperoni Pizza
_X_heterogeneous
___homogeneous
Gravel (rocks)
_X__heterogeneous
___homogeneous
Stainless Steel
___heterogeneous
_X__homogeneous
Oatmeal Raisin Cookie
_X_heterogeneous
___homogeneous
Vanilla Ice Cream
___heterogeneous
__X_homogeneous
Cherry KoolAid
Cookies and Cream
Ice Cream
_X__heterogeneous
___homogeneous
Salt Water
___heterogeneous
_X__homogeneous
___heterogeneous
_X__homogeneous
7. Identify other family members for each of these elements.
a) He (helium) - Group _18___
What is special about this group: ____not reactive_____________
2 other elements in this same group: Ne, Ar, Kr, Xe, Rn, Uuo
b) Li (Lithium) - Group __1__
What is special about this group: ____most reactive____
2 other elements in this same group: _H, Na, K, Rb, Cs, Fr________
8. Examine the pictures of substances shown below. Label each substance as
an element, compound or mixture.
a)____element______
b)__compound_______
c)___mixture____
9. A compound has ________different_______________
than those of the elements used to make it.
(same or different)
properties
10. Write the term next to its definition. Choose from the terms in the box.
acid
element
homogeneous
solid
atom
base
compound
heterogeneous
liquid
molecule
neutral
mixture
soluble***
gas
indicator
oxidation
precipitate
insoluble***
states of matter
density
a) _________atom____________________ - smallest particle of matter
b) __________element___________________ - simplest form of matter
c) _________compound_________________ - 2 or more elements whose atoms have
chemically combined
d) ____________mixture_____________ - 2 or more substances physically combined
e) ______heterogeneous_________________ - mixture with individual parts visible
f) _______states of matter_______________________ - solid, liquid, gas
g) ___________solid___________________ - definite volume and shape
h) ____________liquid__________________ - definite volume, changeable shape
i) ____________gas__________________ - changeable volume and shape
j) ______________homogeneous___ - mixture that appears the same throughout
k) __________soluble____________________ - able to dissolve***
l) __________insoluble____________________ - NOT able to dissolve***
m) _______acid_______________________ - pH less than 7, lemon juice is an example
n) __________base________________ - pH greater than 7, baking soda is an example
o) __________neutral____________________ - pH = 7, pure water is an example
p) _______oxidation_______________________ - chemical reaction with oxygen
q) ______precipitate______________ - new solid created from two liquids
11. What is the change in state for each of these phase changes?
a) melting – going from _____solid______________ to _________liquid____________
b) evaporation - going from _____liquid_____________ to ______gas______________
c) condensation - going from ______gas_____________ to ________liquid_________
d) freezing - going from ________liquid________________ to ______solid__________________
12. Name an example of a solution.
_______salt______________ + _______water______________ = ______saltwater_______
Solute
Solvent
Solution
13. Answer these questions about acids and bases.
a) Name two acids. _____lemon juice_____________ & ________vinegar____________
b) Name two bases. ______ammonia_______________ & _________baking soda________
c) What is the pH range of acids? ____1____ - _____6____ bases? ___8___ - ____14___
d) What is the pH of a neutral solution? ___7______
14. Examine the following table, and then answer the questions below.
Substance
Type of Matter
Boiling Point (°C)
Melting Point (°C)
aluminum
Element
2,519
660
mercury
Element
357
-39
Sodium chloride
Compound
1,413
801
water
Compound
100
0
a) Write the element with the highest boiling point. ____aluminum______________
b) Write the compound with the lowest melting point. _____water____________
c) Which phase change is happening at the boiling point? __evaporation (L -> G)_
15. Identify the 5 ways you can know that a chemical reaction has taken place.
a) ____production of an odor_____
b) ______change in temperature____
c) _______change in color__________
d) _formation of bubbles (gas release)__
e) ____formation of a solid
(precipitate)_
16. Match these experiments to the evidence that a chemical reaction took
place. Put the letters (a-e) from question #15 in the appropriate blank.
Chalk Lab
_____e______________
Citric acid, Baking Soda, & Vinegar
______b,d______________
Hot Milk & Vinegar
_______e_____________
Cabbage Juice, Calcium Chloride, & Baking Soda
_______b,c,d_____________
17. Match the Inquiry vocabulary with the definition.
Independent variable __c___
a. the variable the scientist measures (the effect)
Dependent variable __a___
b. the variable the scientist keeps the same for all tests
Constant/control variable _b____
c. the variable the scientist changes (the cause)