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Worksheets18 Week BMT Study Guide
Total questions: 55
Worksheet time: 28mins
Name
Class
Date
1.
Each molecule of salt, NaCl, contains how many Na Cl atoms?
a)
1,1
b)
3,2
c)
2, 1
d)
1, 3
2.
Which of the following occures when alcohol is burned
a)
new atoms are formed
b)
new elements are formed
c)
new molecules are formed
d)
all of the above
3.
What is the density of a sample of liquid that has a volume of 400mL and a mass of 3g?
a)
0.0056 g/mL
b)
0.100 g/mL
c)
0.0045 g/mL
d)
0.0075 g/mL
4.
When a fixed volume of gas increases in temperature, it must also
a)
decrease in pressure
b)
increase in mass
c)
increase in pressure
d)
increase in volume
5.
Scientists test a hypothesis by
a)
formulating questions
b)
drawing conclusions
c)
doing experiments
d)
designing models
6.
The atoms in organic molecules are held together by __________ bonds
a)
Metallic
b)
hydrogen
c)
Ionic
d)
covalent
7.
Which type of graph best shows a comparison of several items or events?
a)
pie graph
b)
bar graph
c)
line graph
8.
Which one is NOT an example of a pure substance?
a)
element
b)
compound
c)
molecule
d)
moles
9.
Which unit is used to measure the height of a billboard sign?
a)
inches
b)
meter
c)
feet
d)
gram
10.
3 examples of a physical property
a)
density, boiling point, freezing point
b)
flammability, corrosive, rusting
11.
Fusion produces ________ nuclei
a)
smaller
b)
larger
12.
An object's volume can be found by dividing its mass by its ________?
a)
mass
b)
density
c)
volume
13.
Which type of graph best shows data that are parts of a whole?
a)
bar
b)
line
c)
pie
14.
Which of the following are the products and reactants of a chemical reaction most likely to have in common?
a)
molecules
b)
atoms
c)
physical properties
d)
chemical properties
15.
An element's atomic number is equal to it's number of
a)
protons
b)
atomic weight
c)
isotope
16.
A covalent compound made of two nitrogen atoms and four sulfur atoms would be named
a)
trinitrogen sulfide
b)
pentanitrogen tetrasulfide
c)
dinitrogen tetrasulfide
d)
nitrogen tetrasulfide
17.
Which SI prefix means one thousandth?
a)
mega
b)
milli
c)
kilo
d)
hecto
18.
Prefix for 1/1000
a)
mega
b)
milli
c)
kilo
d)
deka
19.
Nuclear power used for electricity is produced by
a)
fission
b)
fusion
20.
When oxygen Iron(II) combines with oxygen to form Iron(II) oxide, the charge of the iron ion is
a)
2
b)
1
c)
4
d)
3
21.
How would this be written in conventional notation? 1,200,000
a)
1.2 x 105
b)
1.2 x 106
c)
1.2 x 104
d)
1.2 x 108
22.
An iron atom has an atomic mass of 56. Its atomic number is 26. How many protons does the iron atom have?
a)
56
b)
82
c)
26
d)
30
23.
An example of an endothermic reaction is
a)
instant ice-pack (cold pack)
b)
instant hot-pack (hand warmers)
24.
In a balanced chemical equation, to mass of the reactions is equal to the mass of the?
a)
atomic weight
b)
atomic number
c)
products
d)
electrons
25.
Convert 1,275 milligrams to grams
a)
12.75g
b)
.1275g
c)
127.5g
d)
1.275g
26.
The substance that is formed in a chemical reaction is called the
a)
reactant
b)
product
c)
element
27.
A precise measurement is one that
a)
contains the correct number of significant figures
b)
is close to the true value
c)
contains at least three significant figures
d)
is as exact as possible
28.
Which of the following occurs in an endothermic reaction but not in an exothermic reaction
a)
energy is absorbed
b)
atoms are rearranged
c)
chemical bonds are broken
d)
molecules are formed
29.
An ionic compound of Lithium and sulfur would be named?
a)
Dilithium trisulfide
b)
Lithium monosulfide
c)
Lithium sulfide
d)
monolithium trisulfide
30.
Atoms have no electric charge because they have an equal number of _________ and ________
a)
atoms, electrons
b)
atoms, atomic number
c)
electrons, protons
d)
protons, atoms
31.
The scientific method usually begins with
a)
forming a hypothesis
b)
making an observation
c)
collecting data
d)
testing a hypothesis
32.
Copper is an element that can either have a charge of +1 or +2. An ionic compound made of copper (Cu2+) and oxygen would be named what?
a)
2 Copper oxide
b)
Copper oxide^2
c)
Copper (II) oxide
d)
Copper oxide
33.
Valence electrons determine an atom's ________ properties
a)
physical
b)
chemical
34.
The force at which gravity pulls on a quantity of matter is referred to as ________?
a)
hight
b)
motion
c)
kilograms
d)
weight
35.
The SI unit for measuring temperature is the
a)
mole
b)
degree
c)
ampere
d)
kelvin
36.
An ionic bond is a bond that forms between ions with ________ charges
a)
same
b)
equal
c)
opposite
d)
identical
37.
At constant volume, as the temperature of a gas decreases, it's pressure ________
a)
decrease
b)
increase
c)
stays the same
38.
Which SI prefix means one million
a)
milli
b)
kilo
c)
deca
d)
mega
39.
A type of reaction that produces an increase in temperature is _____?
a)
exothermic
b)
endothermic
c)
synthesis
d)
displacement
40.
The number of energy levels filled in an atom is determined by
a)
protons
b)
electrons
c)
moles
d)
reactants
41.
A nuclear chain reaction occurs when excess ______ collide with other nuclei
a)
valence electrons
b)
electrons
c)
protons
d)
neutrons
42.
In radioactive decay, with each successive half-life, half the remaining sample decays to form another?
a)
coefficients
b)
exothermic reaction
c)
element
d)
isotopes
43.
After formulating a question, the next step of the scientific method is
a)
to draw a conclusion
b)
to research and collect data
c)
to test with an experiment
d)
to report results
44.
The forces that hold different atoms or ions together are
a)
valence electrons
b)
chemical bonds
c)
isotopes
d)
protons
45.
What is the mass number of an element that has 19 protons, 19 electrons, and 20 neutrons?
a)
39
b)
20
c)
19
d)
38
46.
How much effect do commonly found isotopes have on the average atomic mass of element?
a)
less than rarely found isotopes
b)
same as rarely found isotopes
c)
more than rarely found isotopes
d)
no effect on atomic mass
47.
When a nucleus undergoes nuclear decay by gamma rays, the atomic number of the element
a)
remains the same
b)
decreases by 1
c)
increases by 1
d)
becomes 0
48.
Because the overall charge in a compound must be _______, the charge of the iron in Fe2O3 can be calculated as 3+
a)
+1
b)
+2
c)
-1
d)
0
49.
Two different isotopes of an element have different number of
a)
atoms
b)
neutrons
c)
electrons
d)
moles
50.
A substance that undergoes a change in a chemical reaction is a
a)
Synthesis reaction
b)
Single-replacement
c)
product
d)
reactant
51.
Which graph best shows a change in data over time
a)
pie graph
b)
line graph
c)
bar graph
d)
circle graph
52.
Potassium's atomic number is 19. This means that a potassium atom has _____ protons in it's nucleus.
a)
39
b)
19
c)
18
d)
23
53.
In order of most to least penetrating radiation we have
a)
Alpha , Beta, Gamma
b)
Beta , Gamma , Alpha
c)
Gamma, Beta, Alpha
d)
Gamma, Alpha, Beta
54.
What type of nuclear decay is represented in the following equation?
146C --> 147 N + 0-1e
146C --> 147 N + 0-1e
a)
enamel decay
b)
alpha decay
c)
beta decay
d)
gamma decay
55.
24096Cm --> xyPu + 42He
What are the valuse of x and y in this alpha decay?
What are the valuse of x and y in this alpha decay?
a)
x= 236, y=94
b)
x= 240, y= 96
c)
x= 244, y= 98
d)
x= 242, y= 94
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