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Chemistry Review
Chemistry Review
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8th Grade, Chemistry, Matter, Properties, Atoms, Periodic Table, Chemical Bonds
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Questions
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Answers
1
How many protons, neutrons, and electrons are in the most abundant isotope of potassium?
20,20,19
19,20,19
20,19,19
19,19,19
2
True or false: Carbon dioxide is an example of an ionic compound.
false
true
3
A change of state from a gas to a solid is called
Evaporation
Deposition
Sublimation
Solidification
4
A hot air balloon is an example of the...
pressure-temperature relationship
pressure-volume relationship
pressure-number of particles relationship
volume-temperature relationship
5
True or False: a compound has the same properties as the elements that make it
false
true
6
Element, Compound, or Mixture?
Compound
Element
Mixture
7
Find the element that is in Group 2, Period 2.
Na
Be
H
Cu
8
How many periods are on the Periodic Table?
7
9
18
1
9
Element, Compound, or Mixture?
Compound
Mixture
Element
10
Physical/Chemical Change: Burning wood
Physical Change
Chemical Change
11
All living and nonliving things are made of
soil
water
elements
air
12
Find the element with atomic number 15.
P
S
K
N
13
Covalent compounds are compounds that
consist only of nonmetallic elements.
have atoms that share electrons.
exist as individual molecules.
all of these
14
Which state of matter has a definite shape and definite volume?
Plasma
Liquid
Solid
Gas
15
Compounds form as a result of chemical _____.
properties
reactions
weights
cloning
16
The periodic table has vertical columns called ________
Periods
Tables
Groups/ families
Rows
17
When metals and nonmetals form bonds, the nonmetal ___________
gives away electrons
doesn't do anything
takes electrons
shares electrons
18
Find the element that is in Group 1, Period 1.
H
He
C
B
19
The force of attraction between the opposite charges of the ions is a(n) _________________
cation bond
anion bond
ionic bond
covalent bond
20
Brittle means?
Smooth
soft and bendable
Easily cracked or fractured
Man-made
21
Alkali Metals are known to be the least reactive metals on the periodic table.
True
False
22
Keeping other factors constant, doubling gas pressure will...
double the volume
quadruple the volume
halve the temperature
halve the volume
23
Physical/Chemical Change: Water boiling
Physical Change
Chemical Change
24
True or false: All compounds consist of a fixed ratio of elements.
true
false
25
In most pure substances, melting occurs at a specific temperature called the
melting point
ionization point
freezing point
boiling point
26
True/False - Electrons are in the nucleus.
False
True
27
Element, Compound, or Mixture?
Element
Compound
Mixture
28
What is the basic building block of an element?
Proton
Atom
Electron
Matter
29
True/False - The Noble Gases are very reactive.
True
False
30
What is it called when water vapor cools back into liquid droplets?
sublimation
condensation
solidification
evaporation
31
Reactive means ________
transfers electricity and heat
Reflects light
Responds to other elements
Man-made
32
Is this matter?
Yes
No
33
Which of these is the definition of matter?
Anything that is not living
Stuff
Anything that is alive
Anything that has mass and takes up space
34
Atoms form chemical bonds to achieve
the most stable arrangement of electrons
a full inner energy level
1 valence electron
a complete outer energy level
35
What state of matter has no definite shape and no definite volume?
Gas
Plasma
Liquid
Solid
36
The work of your diaphragm to help in breathing is an example of the...
pressure-temperature relationship
volume-temperature relationship
pressure-number of particles relationship
pressure-volume relationship
37
Which of the following DO NOT affect the behavior of gases?
Mass
Temperature
Pressure
Volume
38
Find the element that is in Group 18, Period 1.
H
O
He
Li
39
What happens when condensation occurs?
Loss of energy and decrease of movement
Loss of energy and increase of movement
Gain of energy and increase of movement
Gain of energy and decrease of movement
40
Which is NOT a property of most metals?
conductors
gas
solid
shiny
41
The relationship between gas pressure and volume with the temperature and number of particles held constant is a(n)...
familial relationship
personal relationship
inverse relationship
direct relationship
42
What is the name of MgCl
2
?
Magnesium(II) chlorine
Magnesium(II) chloride
Magnesium chloride
Magnesium chlorine
43
A compound is two or more elements chemically bound...
that lose their properties and create a new substance
that is made up of a single type of atom
that keep their properties
that break easily
44
Which of the following is not true about solids?
They stay in about the same position
They are completely motionless
They are tightly packed
They vibrate back and forth
45
A proton has a _______ charge
Electric
Neutral (No Charge)
Positive
Negative
46
According to the Octet Rule, atoms are happy with
how many electrons
in their outer energy level?
18
1
8
4
47
A change of state from a solid to a gas is called
Sublimation
Deposition
Ionization
Vaporization
48
What type of bond is in MgF
2
?
none
covalent
metallic
ionic
49
The mass number of an element is equal to the...
# protons
# of electrons
# of electrons+protons
# of neutrons+protons
50
What takes the shape of its container?
liquids and gases
only gases
only liquids
only solids
51
A liquid's volume changes based on the container it is in.
False
True
52
Element, Compound, or Mixture?
Element
Compound
Mixture
53
What is the name of P
2
0
5
?
Diphosphorus Oxide
Oxide Penta Phosphide
Diphosphorus Pentoxide
Phosphorus Oxide
54
An atom that has gained or lost electrons is called a(n) ___________
neutron
quark
ion
atom
55
Element, Compound, or Mixture?
Compound
Element
Mixture
56
The _____ number is the amount of protons in an atom.
Mass
Phone
Atomic
Jersey
57
The type of bond formed between a metal & a nonmetal is...
none
covalent
metallic
ionic
58
A change in the number of collisions that gas particles make is a useful description of...
pressure
number of particles
temperature
volume
59
What happens when evaporation occurs?
Gain of energy and decrease of movement
Loss of energy and decrease of movement
Gain of energy and increase of movement
Loss of energy and increase of movement
60
Which of the following is NOT a unit of gas pressure?
mm of Hg
kilopascal
newtons/meter2
newton
61
What is this a picture of?
Mixture
Compound
Element
Cells
62
The boiling point of water is lower on a mountain than at sea level due to
more air pressure
less air pressure
because of the outside temperature
because of cloud coverage
63
NaCl is an example of a(n)...
Mixture
Element
Compound
Liquid
64
This shows what elements a compound contains and how many of each
chemical formula
molecule formula
periodic table
polyatomic ion
65
A malleable metal means?
it conducts electricity
it is very reactive
it has a high melting point
It can be shaped with pressure
66
A positively charged ion is called a(n) ______________
proion
cation
neutrion
anion
67
True or False: There are more metals than non-metals on the periodic table.
True
False
68
Which is a physical property?
smoke
color change
flammability
volume
69
A _ is a force of attraction between atoms or ions.
valence electrons
chemical bond
chemical reaction
gravity
70
What happens when melting occurs?
loss of energy and decreased movement
gain of energy and decreased movement
Gain of energy and increased movement
loss of energy and increased movement
71
What type of covalent bond is shown in the picture?
single
double
ionic
triple
72
Element is...
made up of the same type of atoms
made up of different types of atoms
made up of compounds and mixtures
is not on the periodic table
73
The attraction that forms between atoms when they share electrons is a(n)
covalent bond
anion bond
cation bond
ionic bond
74
The kinetic theory of matter says that all particles of matter are...
in constant random motion
in the solid state at room temperature
attracted to each other by Intermolecular Forces
not in motion when in the solid state
75
What periodic group is Chlorine (Cl) located in?
Noble Gases
Halogens
Transition Metals
Alkali Metals
76
Sodium catches fire when it hits water. What is happening?
A chemical change
A physical change
Conducting
Magic
77
Is this matter?
Yes
No
78
The most common state of matter in the universe is...
Solid
Plasma
Gas
Bose-Einstein Condensate
79
The state with the greatest organization of particles is...
liquid
solid
gas
plasma
80
Physical/Chemical Change: Dissolving Salt in Water
Physical Change
Chemical Change
81
Element, Compound, or Mixture?
Mixture
Element
Compound
82
Bonds form when atoms share or transfer _.
neutrons
valence electrons
inner electrons
protons
83
In a heating curve the plateaus occur when there is...
evaporation
a temperature change
a phase change
an increase in the kinetic energy of the material
84
A collection of elements on the periodic table with similar properties are....
Compounds
Periods
Group
Tables
85
Change from a liquid to a gas is all of the following except
Evaporation
Sublimation
Vaporization
Boiling
86
The change of state from liquid to solid is called...
melting
freezing
boiling
sublimation
87
The atomic mass of an element is equal to the...
weighted average of the mass of the isotopes of the element.
average mass of the isotopes of the element.
# of neutrons+protons
# protons
88
A _ is a unique substance that forms when two or more elements combine chemically.
compound
dot
convalent
ionic
89
Lead is an example of a(n)...
Pencil
Mixture
Compound
Element
90
The neutral particle formed when atoms share electrons is called a(n) _______________
molecule
ion
atom
formula unit
91
There can be up to ____ electrons in the 2nd energy level.
8
4
18
2
92
Water is unique because its
solid form takes up more space than its liquid form
freezing temperature is 0°C
All of the answers are correct
solid form is less dense than its liquid form
93
True or false: Water is an example of a covalent compound.
false
true
94
An atom is made up of protons, electrons, and ________
Oxygen
Matter
DNA
Neutrons
95
The relationship between temperature and volume in a gas with the pressure and number of particles held constant is a...
familial relationship
personal relationship
direct relationship
inverse relationship
96
Find the element that is in Group 13, Period 3.
Na
K
Al
He
