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