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WorksheetsReview For Midterm
Total questions: 65
Worksheet time: 3hrs 42mins
Name
Class
Date
1.
Pizza
a)
Heterogeneous
b)
Homogeneous
2.
Sugar water
a)
Heterogeneous
b)
Homogeneous
3.
Salad is an example of a
a)
homogeneous mixture
b)
heterogeneous mixture
4.
What is the difference between a homogeneous mixture and a heterogeneous mixture?
a)
homogeneous is the same throughout, heterogeneous is different throughout
b)
homogeneous is different throughout, heterogeneous is the same throughout
5.
Which of the following tells you that a chemical change may have occurred?
a)
Change Shape
b)
Melting
c)
Vaporizing
d)
Change in color
6.
Is wood burning a physical or chemical change?
a)
Physical
b)
Chemical
7.
Is Gatorade powder dissolving in water physical or chemical change?
a)
Physical
b)
Chemical
8.
Is making orange juice a physical or chemical change?
a)
Physical
b)
Chemical
9.
Is copper tarnishing a physical or chemical change?
a)
Physical
b)
Chemical
10.
The Law of Conservation of Mass tells us matter can't ______________.
a)
change color
b)
change state of matter
c)
be created or destroyed
d)
change temperature
11.
Which of the following is a sign that a chemical reaction has occurred?
a)
change in shape
b)
melting
c)
formation of a gas
d)
dissolving
12.
What kind of properties can only be observed when a substance changes into a different substance?
a)
physical properties
b)
chemical properties
13.
An object with which of the following densities will float on water?
a)
0.7 g/cm3
b)
1.2 g/cm3
c)
3.5 g/cm3
d)
11.4 g/cm3
14.
Why do ice cubes float in a glass of water?
a)
the ice cubes are more dense than the water
b)
the water is more dense than the ice cubes
c)
the water is more dense than the glass
d)
the ice is more dense than the glass
15.
Which property of matter is determined by dividing its mass by its volume?
a)
elasticity
b)
buoyancy
c)
density
d)
viscosity
16.
Xenon...
a)
is flammable
b)
is corrosive
c)
is unreactive (inert)
d)
will bond with Fluorine
17.
Why do elements in the same column of the periodic table have similar reactivity?
a)
Their electron shells are full.
b)
Their electron shells are empty
c)
They have the same number of valence electrons.
d)
The have different numbers of valence electrons
18.
What are valence electrons?
a)
outer shell electrons
b)
core electrons
c)
inner shell electrons
d)
protons
19.
Why are noble gases generally unreactive?
a)
They have empty shells
b)
They are explosive
c)
They have a full valence shell
d)
They combine with water
20.
Nonmetals
a)
are on the top left of the periodic table
b)
are on the lower left of the periodic table
c)
are on the top right of the periodic table
d)
are at the bottom of the periodic table
21.
Nonmetals
a)
are on the top left of the periodic table
b)
are on the lower left of the periodic table
c)
are on the top right of the periodic table
d)
are at the bottom of the periodic table
22.
What is the formula to solve for the neutron?
a)
Mass + Atomic Number= Neutrons
b)
Mass x Atomic Number = Neutrons
c)
Mass - Atomic Number = Neutrons
d)
Mass + Number of Protons = Neutron
23.
How many neutrons does oxygen have?
a)
16
b)
15.99
c)
8
d)
Doesn't contain any neutrons
24.
This variable in an experiment is the one being changed by the scientist.
a)
dependent variable
b)
independent variable
c)
data
d)
control group
25.
An experiment is performed on plants to see how different liquids affect plant growth. Each plant in the experiment is given a different liquid; water, apple juice, or milk. Each plant has the same amount of soil, sunlight, and listens to the same music. In this investigation, the independent variable is ...
a)
The type of plant
b)
The amount of sunlight
c)
The type of music
d)
The type of liquid
26.
Dependent variable means
a)
the scientist controls what to test
b)
educated guess
c)
ask a question
d)
what is being measured
27.
Which of the following is a pure substance?
a)
CO
b)
C02
c)
Co
d)
H2O
28.
What is sugar?
a)
element
b)
compound
c)
mixture
29.
What is water?
a)
element
b)
compound
c)
mixture
30.
When two or more elements chemically combine
a)
element
b)
compound
c)
mixture
d)
solution
31.
A horizontal row of elements in the periodic table.
a)
column
b)
group
c)
period
32.
A vertical column in the periodic table. Elements share similar properties.
a)
row
b)
group
c)
period
33.
Elements in a ..................have similar chemical properties.
a)
period
b)
group
c)
row
34.
How did Mendeleev organize the elements in his periodic table?
a)
increasing mass only
b)
increasing atomic number only
c)
increasing atomic mass with periods and groups
d)
increasing atomic number with periods and groups
35.
What is the name of this element?
a)
Helium
b)
Hydrogen
c)
Argon
d)
Silver
36.
What is the mass number of this atom?
a)
1
b)
3
c)
4
d)
7
37.
What is the atomic number of this atom?
a)
2
b)
4
c)
6
d)
none of the above
38.
What group does this element belong to?
a)
Group 1: Alkali metals
b)
Group 18: Noble Gases
c)
Group 2: Alkaline-Earth Metals
d)
Group 17: Halogens
39.
The innermost energy level has a maximum of how many electrons?
a)
1
b)
2
c)
6
d)
8
40.
What is the goal of the Lewis Dot Structure?
a)
To determine the electron position.
b)
To show the element's valence electrons & bonding capabilities.
c)
To find the atomic mass of an element.
d)
To search for the number of electrons in an individual atom.
41.
According to the octet rule most elements need _______ valence electrons.
a)
2
b)
8
c)
6
d)
18
42.
This is a correct dot diagram for carbon (C)
a)
true
b)
false
43.
What is the charge on a chloride ion?
a)
-1
b)
1
c)
+2
d)
+1
44.
A(n) _________ is an ion with a positive (+) charge.
a)
anion
b)
cation
c)
ion
d)
solute
45.
When an atom loses an electron, it becomes a:
a)
positive ion
b)
negative ion
c)
neutral ion
d)
neutral atom
46.
Magnesium bromide is an ionic compound with the chemical formula MgBr₂. What does the "2" tell you?
a)
There are 2 bromide ions for every magnesium ion
b)
Bromide has a 2- charge
c)
Bromide has a 2+ charge
d)
There are 2 magnesium ions to every bromide ion
47.
What property of this wave is represented by the letter "A"
a)
amplitude
b)
crest
c)
trough
d)
wavelength
48.
What property of the wave is represented by the letter "B"?
a)
amplitude
b)
crest
c)
trough
d)
wavelength
49.
The highest point on a wave is:
a)
the crest
b)
the trough
c)
the top
d)
the coast
50.
The lowest point on a wave is the:
a)
Amplitude
b)
Crest
c)
Trough
d)
Wavelength
51.
The number of wavelengths that pass a point each per second is:
a)
frequency
b)
period
c)
longitudinal
d)
transverse wave
52.
Which wave in the diagram has the greatest frequency?
a)
1
b)
2
c)
3
d)
4
53.
Which wave in the diagram has the greatest wavelength?
a)
1
b)
2
c)
3
d)
4
54.
What is the correct order of the visible light spectrum starting with the longer wavelength?
a)
Red, yellow, orange, blue, violet, indigo
b)
Violet, indigo, blue, green, yellow, orange, red
c)
Green, yellow, blue, indigo, red, orange
d)
Red, orange, yellow, green, blue, indigo, violet
55.
What is an example of a wave with a long wavelength and low frequency?
a)
Gamma rays
b)
Infrared
c)
Radio
d)
Visible light
56.
Which color has the longest wavelength?
a)
Yellow
b)
Red
c)
Green
d)
Purple
57.
Scientists observed a celestial object emitting a wavelength of 3 x 103m. What type of telescope did the scientists have to use to view this?
a)
Radio wave
b)
Infrared ray
c)
X-ray
d)
Gamma Ray
58.
Which problem is balanced?
(Check ALL answers)
(Check ALL answers)
a)
PbO2 + 2H2
b)
SO2 + H20 --> H2SO4
c)
2Na + 2H2O --> 2NaOH + H2
59.
Balance this chemical reaction......?
__H2O2 ----> __H2O + O2
__H2O2 ----> __H2O + O2
a)
2H2O2 // 2H2O
b)
1H2O2 // 2H2O
c)
2H2O2 // 1H2O
d)
H2O2 // 2H2O
60.
Which of the following equations are correctly balanced?
a)
12CO2 +H2O --> C6H12O6 + O2
b)
CO2 + 9H2O --> C6H12O6 + O2
c)
CO2 + H2O --> 3C6H12O6 + O2
d)
6CO2 + 6H2O --> C6H12O6 + 6O2
61.
What is the right ratio of chemicals for the BCE (Balanced Chemical Equation)?__Na + __H2O --> __NaOH + __H2
a)
2,2 --> 2,1
b)
4,4 --> 4,1
c)
1,2 --> 2,4
d)
1,2 --> 2,1
62.
PCl5 + ___ H2O → ___ HCl + H3PO4
a)
4, 5
b)
1, 6
c)
3, 8
d)
2,2
63.
__ Al + __ FeO → Al2O2 + __ Fe
a)
1, 1, 2
b)
2,1,2
c)
2, 2, 2
d)
2,4,2
64.
Which side of a chemical equation is the reactant side?
a)
Left (before the yields sign)
b)
Right (after the yields sign)
65.
Which side of a chemical equation os the product side?
a)
Left (before the yields sign)
b)
Right (after the yields sign)
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