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HHS B. Johnson PS
HHS B. Johnson PS
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#physicalscience #review
Flashcards
70 cards
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Questions
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Answers
1
Molar mass is defined as
the mass in grams of one mole of a substance
the amount of a substance necessary for a positive charge
the number of particles in one mole of a substance
the SI base unit that describes the amount of a substance
2
The smallest unit of an element that maintains the properties of that element is
a compound
a substance
a molecule
an atom
3
Which of these units would be used to measure the height of a bookcase
kilogram
mole
kelvin
meter
4
Caroline passed out during lab after smelling a chemical directly. In the future, she should
do the same thing all over again
never participate in lab again
none of these
"waft to whiff"
5
Often atoms join so that each atom will have
a full valence energy level or 8 valence electrons
more electrons than either protons or neutrons
an even number of electrons
an equal number of protons and electrons
6
When an atom gains an electron, it becomes
a cation
none of these
a reactant
an anion
7
According to the kinetic theory of matter, which of the following is true about matter
The higher the temperature, the faster the particles move
all of these answers
The atoms and molecules of a substance are always in motion
Massive particles move slower than less massive particles
8
Magnesium (Mg) is located to the right of sodium because Mg has
more protons.
no protons.
no neutrons.
fewer protons.
9
A mole is an SI base unit that describes the
mass of a substance
volume of a substance
amount of a substance
electric charge of a substance
10
Which is not a family of the periodic table?
anions
halogens
noble gases
alkaline-earth metals
11
Atoms have no charge because:
All of these are correct.
have an equal number of neutrons and protons.
have an equal number of electrons and protons
have neutrons in their nuclei.
12
Digesting food is an example of
change of state
buoyancy
physical change
chemical change
13
When ice melts to form liquid, energy is
absorbed
released
destroyed
created
14
Which of the following is an element?
sand
nylon
iron
salt
15
Avagadro's number is useful for
locating an atom's electrons
none of these answers
counting large objects
counting atoms
16
Atoms that gain or lose electrons are called
isotopes
ions
nonmetals
metals
17
Atoms of elements that are in the same group have the same number of
valence electrons
neutrons
protons
protons and neutrons
18
An atom's mass number equals the number of
protons plus the number of neutrons
protons plus the number of electrons
protons
neutrons
19
During lab, the following must not be worn
all of these
clothes
deodorant
sandals/open toed shoes
20
Which state of matter will hold it's shape without a container?
solid
gas
liquid
plasma
21
Archimedes' principle: The buoyant force on a(n) ___equals the weight of the displaced fluid.
fluid mixing with another liquid
object in the fluid
substance dissolving into the fluid
object floating on the fluid
22
Two different isotopes of an element have different
numbers of neutrons
atomic numbers
numbers of electrons
numbers of protons
23
Which of the following would be a chemical change?
melting
shattering
burning
moving
24
Accuracy is judged by:
the reputation of the scientist
how close a value is to the true value
the tool used to collect the measurement
none of these
25
You spill something in the lab, have an accident or injury. Who do you call to help?
your teacher
911
ghostbusters
security
26
Which of the following statements
NOT
true?
Protons have a positive charge
Neutrons have no charge.
Neutrons have a negative charge.
A nucleus has a positive charge.
27
The change of a substance from a solid directly to a gas is called
condensation
melting
evaporation
sublimation
28
The main branches of science are
physics and chemistry
biological, physical, and earth
biology, zoology, and ecology
medicine and agriculture
29
The number of energy levels filled in an atom is determined by the
neutrons
photons
electrons
protons
30
Which of the following is NOT a pure substance?
molecule
compound
mixture
element
31
The order of elements in the periodic table is based on
the number of neutrons in the nucleus
the electric charge of the nucleus
atomic mass
the number of protons in the nucleus
32
SI is considered a consistent system because it
used to derive units
has seven base units
dates back to 1795
is used worldwide
33
Which property of a substance is
not
affected by physical changes?
reactivity
position
shape
size
34
As you move from left to right on the periodic table, atoms:
become more metallic.
have a lower atomic number.
have a lower atomic mass.
become less metallic
35
What is an atom's nucleus made of?
only neutrons
protons and neutrons
only protons
anodes
36
Which graph best shows a change in data over time?
pie graph
all of these
line graph
bar graph
37
Which of the following elements is an alkali metal?
mercury
sodium
magnesium
calcium
38
What is Mendeleev known for?
creating today's atomic model
discovering Mendelevium
publishing the first periodic table
discovering protons
39
The resistance of a fluid to flow is referred to as
energy
shape
pressure
viscosity
40
Which of the following statements is
NOT
true?
neutrons have no charge
neutrons have a negative charge
a nucleus has a positive charge
protons have a positive charge
41
Which type of graph best shows a comparison of several items or events?
all of these
bar graph
line graph
pie graph
42
Which SI prefix means one million?
milli-
giga-
kilo-
mega-
43
Which of the following is not a fluid
water
air
carbon dioxide
wood
44
The order of elements in the modern periodic table is based on an element's
atomic mass
name
atomic number
chemical symbol
45
Which of these units would be used to measure the mass of a computer?
kelvin
meter
mole
kilogram
46
Temperature is a measure of the average _____ energy of the particles in the object.
thermal
kinetic
chemical
potential
47
The first step in the scientific method is usually
forming a hypothesis
collecting data
testing a hypothesis
making an observation
48
All matter is made of atoms and molecules that are
always fixed in position
moving slowly
always in motion
moving in the same direction
49
A material that can be represented by a chemical formula is
a mixture
a compound
a homogeneous solution
an element
50
True or False: It's ok to point a test tube of liquid at someone as long as it looks like water
False
True
51
The kinetic theory states that the higher the temperature, the faster the
lighter particles within a substance clump together
bonds between the atoms break down
molecules of gas rush together
particles that make up a substance move
52
Unlike a plasma, a gas
has no definite volume
has no definite shape
does not conduct electricity
is affected by magnetic fields
53
The chemical formula for table sugar is C
12
H
22
O
11
. How many oxygen atoms are in each molecule?
22
11
2
12
54
Evaporation refers to the change of a state from a
liquid to a sold
liquid to a gas
gas to a liquid
solid to a liquid
55
After formulating a question, the next step in the scientific method is
to research and collect data
to test a hypothesis
to perform an experiment
to state a conclusion
56
Temperature is a measure of the average _____ energy of the particles in the object.
thermal
kinetic
chemical
potential
57
Avagadro's number is defined as the number of particles in
one gram of a substance
one mole of a substance
one liter of a substance
one kilogram of a substance
58
The three main categories of elements are metals, nonmetals, and
radioactive isotopes
alkali metals
inert gases
metalloids
59
Goggles are worn during some labs
to make you look super cool
only if you don't already wear glasses
to improve your vision
to protect your eyes
60
You have 85.5g of Fluorine (molar mass of 19 g/mol). How many mols of fluorine do you have?
19
4.5
85
45
61
The chemical formula for water , H
2
O, means that each water molecule contains
two hydrogen atoms and zero oxygen atoms
one hydrogen atom and two oxygen atoms
two hydrogen atoms and two oxygen atoms
two hydrogen atoms and one oxygen atom
62
According to modern atomic theory, it is nearly impossible to determine an electron's exact
color
charge
mass
position
63
A chemical change occurs whenever
hot objects melt
objects change shaped
substances are mixed
new substance form
64
Who determined that atoms could be divided?
Thompson
Dalton
Rutherford
Democritus
65
Which of the following is a compound?
soup
salt
air
paint
66
Which of these is not a part of Dalton's atomic theory?
Atoms of an element are alike.
Atoms are made of electrons.
Atoms cannot be divided.
Atoms of different elements form compounds.
67
Convert 1,250 millimoles to moles.
1.25 mol
0.125 mol
12.5 mol
125 mol
68
In Mendeleev's periodic table, elements in each column had similar
atomic numbers
properties
atomic masses
symbols
69
A subatomic particle that has a negative charge is called
element
a molecule
an electron
compound
70
Which of the following is made of at least two different types of atoms?
matter
element
compound
molecule
