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Chemistry Midterm Review

Total questions: 50

Worksheet time: 45mins

Name
Class
Date
1.
Energy in the sun is produced as a result of nuclear ____ reactions.
a)
fusion
b)
fission
c)
waste
d)
sub
2.
The three types of nuclear radiation in order of increasing penetrating power are
a)
alpha, beta, gamma
b)
alpha, gamma, beta
c)
beta, alpha, gamma
d)
gamma, alpha, beta
3.
What is nuclear fission?
a)
Big nucleus splits to small nuclei
b)
Small nuclei fuse into a bigger nucleus
c)
Stars
d)
Making compounds
4.
What is an alpha particle equivalent to?
a)
A beta particle
b)
An electron
c)
A helium nucleus
d)
An energy ray/wave
5.
Has the symbol
a)
Alpha
b)
Beta 
c)
Gamma
6.
Which type of radioactive decay is occurring in this equation? 
a)
Alpha decay
b)
beta decay
c)
gamma decay
d)
positron emission
7.

What is the major drawback to fission power?

a)

Radioactive Waste

b)

CO2 Emissions

c)

SO2 Emissions

d)

All of the Above

8.

What is NOT a benefit of a fission reactor?

a)

Conserves Energy

b)

Supplies plentiful energy

c)

Produces carbon dioxide and other greenhouse gasses

d)

Eliminates a megaton of sulfur oxides

9.
Is this equation balanced?
a)
yes
b)
no
c)
Not enough information
10.
Balance this equation
_Al +_HCl --> _H2 +_AlCl3
a)
2, 6, 3, 2
b)
it is already balanced
c)
4, 12, 3, 4
d)
2, 1, 4, 5
11.
Balance this equation.
_CH4 + _O2 --> _CO2 + _H2O
a)
1,2,1,1
b)
2,1,2,1
c)
1,2,1,2
d)
0,2,0,2
12.
A student mixes vegetable oil and water in a beaker. Once the mixture settles, she notes that the oil is at the top, and the water is at the bottom. What does she know about the density of the oil?
a)
It is less than the density of the water.
b)
It is greater than the density of the water.
c)
It is the same as the density of the water.
13.
Two different-sized objects are placed on a two-pan balance. If the balance is level, the objects have the same
a)
volume
b)
density
c)
mass
d)
color
14.
Of the three liquids shown in the picture, which has the highest density?
a)
The yellow one
b)
The red one
c)
The blue one
15.
True or false: Two objects that are the same size can have different masses.
a)
True
b)
False
16.
25 mL of a mystery liquid has a mass of 37.5 grams. What is the density of the liquid?
a)
937.5 g/mL
b)
0.67 g/mL
c)
1.5 g/mL
d)
62.5 g/mL
17.
A student mixes 25 grams of vinegar with 10 grams of baking soda in an open beaker. What might the student measure as the mass in the beaker once the reaction is complete?
a)
35 grams
b)
34 grams
c)
36 grams
18.
The pH of a solution is tested, and it is found to be a basic solution. Of the following choices, what could the pH have been?
a)
3
b)
9
c)
7
d)
5
19.
pH less than 7.
a)
Acids
b)
Bases
c)
All
20.
Which of the following statements is correct?
a)
Blue litmus paper turns red when placed in a base.
b)
Red litmus paper turns blue when placed in a base.
c)
Blue litmus paper stays blue when placed in an acid.
d)
Red litmus paper stays red when placed in a base.
21.

This is the result of two or more substances being physically combined.

a)

molecule

b)

compound

c)

mixture

d)

chemical

22.

This is the part of a solution present in the greatest amount. It is usually what does the dissolving. There is only one of these in every solution.

a)

solution

b)

solvent

c)

solute

d)

salute

23.

Which of the following are factors that affect the rate of dissolving? (choose all that apply!)

a)

stirring

b)

heating

c)

time of day

d)

particle size

e)

Fortnite Tier

24.

When dissolving marshmallows in your hot chocolate, which of the following would dissolve the fastest?

a)

a large marshmallow with a total mass of 10 grams, since larger particles dissolve faster because they have less surface area

b)

a handful of mini marshmallows with a total mass of 10 grams, since smaller particles dissolve faster because they have greater surface area

25.

When trying to dissolve a large sugar cube, which would be the best solvent to choose in order to dissolve the cube in the shortest amount of time?

a)

100 mL of water at 25ºC

b)

100 mL of water at 50ºC

c)

100 mL of water at 100ºC

d)

200 mL of water at 100ºC

26.
How many grams of K2Cr2O7, are soluble in 100 g of water at 95 ºC?
a)
83 grams
b)
75 grams
c)
40 grams
d)
12 grams
27.
When 20 grams of KNO3 is dissolved in 100 grams of water at 80 ºC, the solution can be correctly described as:
a)
supersaturated
b)
saturated
c)
unsaturated
28.
Which is a halogen?
a)
Fluorine
b)
Carbon
c)
Helium
d)
Lithium
29.
Which is an alkaline earth metal?
a)
Calcium
b)
Rubidium
c)
Carbon
d)
Iodine
30.
Which element is in group 4 period 6?
a)
Helium
b)
Chromium (Cr)
c)
Hafnium (Hf)
d)
Barium
31.
Sodium (Na)
a)
alkali metal
b)
alkaline earth metal
c)
halogen
d)
noble gas
32.
a)
Alkali
b)
Alkaline Earth
c)
Halogen
d)
Noble Gases
33.
a)

Transition Metals

b)

Inner Transition Metals

c)

Metals

d)

Metalloids

34.
What do atoms that form positive ions tend to do?
a)
Tend to lose electrons 
b)
Tend to lose protons
c)
Tend to gain electrons
d)
Tend to gain protons
35.
What usually forms the positive ion?
a)
Metal
b)
Non Metals
c)
None
36.
What usually forms the negative ion?
a)
nonmetals
b)
metal
c)
none
37.
Covalent compounds
a)
Share electrons
b)
transfer electrons
c)
contain a sea of electrons
d)
conduct electricity
38.
What is a valence electron?
a)
an electron that is found in the outermost shell of an atom. 
b)
an electron found in the innermost shell of an atom.
c)
an electron found in the middle shell.
39.
How many valence electrons in this structure?
a)
6
b)
5
c)
4
d)
7
40.
The atomic number tells you what?
a)
number of electrons
b)
number of protons
c)
number of neutrons
d)
both electrons and protons in an atom.
41.
Elements which are shiny, conduct electricity and heat are called
a)
metal
b)
nonmetal
c)
metalloid
d)
nonexistent
42.
The atoms along the staircase are called 
a)
metals
b)
nonmetals
c)
metalloids
d)
noble gases
43.
What is the atomic mass equal to?
a)
the number of protons
b)
the number of protons and neutrons
c)
the number of neutrons
d)
the number of protons and electrons
44.
The amount of energy required to raise the temperature 1ºC for every kilogram is called____?
a)
Thermal Energy
b)
Specific Heat
c)
Temperature
d)
Kinetic Energy
45.
Water has a specific heat of 4184 J/KgºC.  Wood has a specific heat of 1760 J/KgºC.  What material needs more energy to raise the temperature 1ºC
a)
Wood
b)
Water
c)
Both are the same
46.
What does temperature measure?
a)
Heat
b)
ºC
c)
Kinetic Energy
d)
Thermal Energy
47.
How does heat flow?
a)
Always from cold to warm
b)
Always from warm to cold
c)
Both warm to cold & cold to warm
d)
It depends on the temperature
48.
When Pressure increases then the Volume must...
a)
Increase
b)
decrease
49.
Volume and temperature have a ______ proportionality.
a)
direct
b)
inverse
c)
linear
d)
exponential
50.
At constant volume, what happens to temperature of a gas when the pressure doubles?
a)
The temperature also doubles.
b)
The temperature decreases to half its original volume.
c)
The temperature doesn't change.
d)
The temperature quadruples.

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