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Science 9- CHEMISTRY
Science 9- CHEMISTRY
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Grade 9 science (Alberta, Canada Curriculum) TOPIC 2: Matter and Chemical Change
Flashcards
126 cards
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Practice quiz
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Questions
126
Answers
1
What is the
red circled
part called (number 8) ?
The number of protons
Atomic Mass Number
Atomic Number
Atomic Mass
2
Find the amount of neutrons in the element (round the number to the closest whole number) :
11
20
10
15
3
What type of mixture is this?
Homogenous (not able to see the substance that makes it)
Solution (not able to see the substance that makes it)
Mechanical mixture (able to see the substance that makes it)
Heterogeneous (able to see the substance that makes it)
4
Products are the
Materials that are formed at the end
Materials that are formed from the reaction
Materials that are made at the beginning
Materials that are used to start the reaction
5
Mendeleev wrote down the 63 known elements on cards and tried to organize them. His goal was to
Find a pattern
Invent Helium
Predict future elements
Make the elements more cool
6
Democritus' idea that each material had its own properties was rejected because
Aristotle was much smarter than him
there was no such thing as atomos
Aristotle believed in water, fire, earth and air
Aristotle was more popular
7
Rutherford also stated that the nucleus was only 1/ 10 000th the size of an atom
FALSE! His calculations are so wrong!
TRUE! What a smart man!
8
The arrows are pointing to the
Electron Factor
Ion Molecule Distribution
Ionic Factor
Ionic Charge
9
How many atoms of Chlorine and Sodium are in the formula? NaCl
0
2 each
3 altogether
1 each
10
The difference between WHMIS and Safety symbols is that
both can be chucked in the trash can
Safety symbols is used for household items
WHMIS is for people using these materials at work
Neither are easy to read
11
Rays were made of negatively charged particles that were smaller in mass than a hydrogen atom
Those charged particles were protons
Those charged particles were atoms
Those charged particles were neutrons
Those charged particles were electrons
12
When a solid changes to a liquid, it is called ...
Sublimation
Evaporation
Condensation
Melting
13
The ability to control fire in the year 8000BC led to the discovery of more common tools like
Ceramic Material
Mud
Rocks
Glass
14
Alkali Metals are found in Group
17
18
2
1
15
Compounds are molecules made of more than one atom bonded together and can be
Made up of different elements ONLY
Made up of different elements
Made up of the same elements
Made up of the same elements ONLY
16
What are some properties of Molecular Compounds?
Distinctive crystal shape
Low boiling point
Insulators
High melting point
17
When a gas changes to a liquid, it is called ...
Condensation
Melting
Evaporation
Vaporization
18
what is the weight of the product ?
56g
32g
74g
88g
19
Halogens are found in Group
2
17
1
18
20
What does this mean ?
Yellow Triangle
Caution
Dangerous
Warning
21
(
Prefix
) + First Element + Prefix + Second Element + "IDE" ending
is the formula for
Molecular Compounds
Ionic Compounds
22
The atomic mass (mass of one atom of an element) was found by
comparing them to hellion
comparing them to carbon
comparing them to titanium
comparing them to explodium
23
What is "
a
"?
atom
proton
electron
neutron
24
First Element + Second Element + "IDE" ending
is the formula for
Molecular Compounds
Ionic Compounds
25
Quantum Mechanics have found that electrons actually exist in a _________________.
Charged Prism
Charged Sphere
Charged Cloud
Charged Cube
26
What does this mean ?
Stop Sign
Warning
Caution
Dangerous
27
What does this mean ?
Warning
Dangerous
orange diamond
Caution
28
Cellular Respiration is a chemical reaction that takes place in
plant cells only
our bodies
our legs only
our cells only
29
When a gas changes to a solid directly, it is called ...
Melting
Deposition
Condensation
Sublimation
30
What does WHMIS stand for?
Working Hazardous Maintenance Information Series
Weird Hairy Materials In Systems
Workplace Hazardous Materials Information System
Wasteful Hazards that Make Information Systems
31
These help speed up a reaction, they are called____. The biological ones are called ____.
Quick Starters; Cells
Catalysts; Enzymes
Enzymes; Catalysts
Enzymes; Cells
32
Molecular Compounds can be found in
all 3
states
TRUE! They have weak bounds and so can be found in all 3!
FALSE! Ionic Compounds can only be solids; so they are, too
33
The results were that particles were reflected in different ways. Rutherford concluded that
The positive particles pass through harmlessly
They will always reflect in different angles
The power is much too strong for the positive particles
There is a positive nucleus
34
What is number 7?
Toxic
Reactive
Corrosive
Oxidizer
35
Nobel Gases are found in Group
1
17
18
2
36
Today alchemy would be know as a __________ since it included magic, not science
Chemistry
Pseudo-science
Fake science
Magic-science
37
Rutherford conducted an experiment with positive particles. He predicted that they would
Bounce off the centre
There is a nucleus
Pass through harmlessly
Reflect in different angles
38
An example of corrosion (when oxygen reacts with metal) is?
Iron Oxides
Dissolving
Cellular Respiration
Rusting
39
When 2 non-metals combine a pure substance called _____________ is formed.
Molecular Compound
Gassy Compound
Non- Metal Compound
Ionic Compound
40
How would you name Oxygen and Magnesium?
MgO (Magnesium Oxide)
O2Mg (Dioxide Magne)
MgO2 (Magnesium Dioxide)
O1Mg (Oxygen Magneside)
41
In the 1500's Robert Boyle started to experiment with ____(under pressure and its composition).
Plasma
Solids
Liquids
Gases
42
A chemical change always results in the formation of a different substance/s
FALSE!
TRUE!
43
Democritus believed that each material was made up of different
atomos
. What does
atomos
mean?
Indivisible
Breakable
Broken
Invincible
44
What is "
b
"?
atom
electron
proton
neutron
45
An compound is _____________.
When 2 or more elements mix to form a homogenous mixture
When 2 or more elements combine chemically
a material that can not be broken down further
a material that can be broken down further
46
What is number 4?
Reactive
Compressed Gas
Corrosive
Biohazards
47
Bohr provided the theory of how electrons orbit the nucleus in
electron clouds
protonic shells
electron shells
neutral fields
48
What type of elements are coloured in gold? What is a property of it?
Non-Metals; Insulators
Metals; Ductile
Metalloids; Malleable
Non-Metals; Conductors
49
What type of mixture is this?
Suspension (when particles are held within each other)
Colloid (particles that are suspended are hard to separate)
50
The name for N
2
O
3
is ...
Dinitrogen Trioxide
Trinitrogen Tetraoxide
Dinitrogen Monoxide
Neon Trioxide
51
What type of mixture is this?
Suspension (when particles are held within each other)
Colloid (particles that are suspended are hard to separate)
52
What type of elements are coloured in green? What is a property of it?
Metals; Ductile
Metalloids; Properties of both Non-Metals and Metals
Non-Metals; Conductors
Non-Metals; Insulators
53
What is number 2?
Oxidizer
Reactive
Toxic
Corrosive
54
Closed systems allow _____ additional material to enter or leave
SOME
ALL
MOST
NO
55
How can you tell that a chemical reaction took place?
Change in odour
Formation of a solid or gas participle
Release or absorption of heat energy
Change in colour
56
Reactants are the
Materials that are formed from the reaction
Materials that are formed at the end
Materials that are used to start the reaction
Materials that are made at the beginning
57
A chemical formula tells us
How chemical the formula is
How many atoms are in each compound ONLY
How many and which elements are in each compound
How the formula is calculated
58
When a solid changes to a gas directly, it is called ...
Deposition
Melting
Sublimation
Condensation
59
When a mixture is formed it combines chemically
TRUE! Sure does!
FALSE! It does not!
60
What is this ?
Warning: Flammable!
Caution: Explosive!
Danger: Oxidizing metal!
Danger: Flammable!
61
An example of a chemical property is
The ability to burn
Reaction with acids
Reaction to heat
Reaction with water
62
If acid is dropped on a stone and it starts bubbling, what type of change is it?
Physical
Chemical
63
How do you find how many
electrons
are in an element?
Atomic Mass - Amount of Protons
protons are equal to electrons (atoms are neutral)
Just find the amount of Protons
Amount of Protons - Atomic Mass
64
When naming an Ionic Compound, you first write the
metal or positive charge
; Secondly ...
The name of the non-metal with the suffix "ide"
The name of the metalloid with the suffix "tri"
The name of the metal with the suffix "ide"
The name of the negative charged atom with the suffix "ide"
65
Families of elements
vary
have different properties
usually have similar properties
are nothing like the other elements
66
Any solid that can be stretched into a long wire is said to be this:
Fun
Dense
Conductive
Ductile
67
An element is _____________.
a material that can be broken down further
When 2 or more elements combine chemically
When 2 or more elements mix to form a homogenous mixture
a material that can not be broken down further
68
Electrons can jump between shells by gaining or losing energy
FALSE! This was only a theory... where is the proof?
TRUE! Ions exist this way!
69
The total mass of the reactants will equal the mass of the product. What is this law called?
The Mass Equation
The Conservation of Mass
The Equal Mass Law
Weight Conservation Law
70
Ionic compounds are formed as result of attraction between 2 opposite charged particles called
Irons
Molecules
Ions
Electrons
71
Which is an example of a physical property?
Melting Point
Color
Boiling Point
Ductility
72
The idea that everything is made up of small particles started with the _________________.
Early Alchemists
Greek Philosophers
Italian Chemists
Indian Mathematicians
73
A chemical reaction takes place when
no substance combines to make a new substance
2 or more substance combine to make the same substances
2 or more substance combine to make a new substance
1000's of substances combine to make new substances
74
What are some properties of Ionic Compounds?
No crystal shape
Good Electrical Conductivity
High boiling point
High melting point
75
What are some factors that effect a reaction ?
Concentration of the reactants
Surface area of the reactants
Temperature of the reactants
Presence of Catalysts
76
Lavoisier studied chemical reactions and invented the naming system. Thus, he is known as the
Father of modern chemistry
Father of modern genetics
Father of modern alchemy
Father of traditional chemistry
77
Open systems allow _____ additional material to enter or leave
NO
LIGHT
HEAVY
ANY
78
What type of elements are coloured in grey? What is a property of it?
Metals; Ductile
Non-Metals; Insulators
Non-Metals; Conductors
Metalloids; Malleable
79
There were many attempts to classify all the elements, the Greeks used ...
Shapes
Gods
Moons ONLY
Celestial Bodies
80
How do you find how many
neutrons
are in an element?
Atomic Mass - Amount of Electrons
Atomic Mass - Amount of Protons
Amount of Protons - Atomic Mass
Just find the amount of Protons
81
When a liquid changes to a solid, it is called ...
Melting
Condensation
Sublimation
Freezing
82
Even though alchemists weren't real scientist, they performed the first chemistry experiments
TRUE! I love alchemists!
False! They don't deserve the praise!
83
Combustion is "burning." The products of Combustion are
Heat and Carbon Monoxide
Water and Nitrogen Dioxide
Water and Carbon Monoxide
Water and Carbon Dioxide
84
When a substance is dissolved in water, it is called ____________.
an aqueous solution
a water solution
an aqua mixture
an aqueous mixture
85
How many atoms of Hydrogen are in the formula? H
2
O
2
0
1
3
86
__________ is an element; __________ is a compound
Water; Sugar
Neon; Carbon Dioxide
Hydrogen; Helium
Oxygen; Carbon
87
What is an ion?
atoms that become charged through the gain/loss of electrons
an atom that creates a new substance every time
atoms with an overall neutral charge
an atom that has the ability to change its charges
88
Alkaline Earth Metals are found in Group
1
18
17
2
89
2000 years after Democritus's time, alchemists carried out experiments that
Aimed to change metals into gold
Had no interest in understanding the nature of matter
Find out about atoms
Taught them about electrons and protons
90
John Newland found that properties of elements seemed to repeat at regular intervals. He called
it The Piano Key Law
it The 8th Rule
it The Law of Octaves
it The law of 8
91
Dalton's symbols were modified by Berzelius, who used Capital Letters. If there was a repeat
Than you put a second letter (lower case)
Than you put any random letter (capital)
Than you put the next letter (upper case)
Than you put any random letter (upper case)
92
When an object goes through a physical change, its appearance may be altered but ...
Its composition remains the same
Its appearance remains the same
Its taste stays the same
Its state remains the same
93
The formula that comes after the arrow is the
Reactants
Product
94
Thomson proposed this model of negative charged electrons within a positive sphere:
Planetary Reference
Model of Electrodes
Raisin Bun Model
Electron Model
95
J.J Thompson discovered the subatomic particle by experimenting with
Cathode Rays
Electron X-Rays
MRI Scans
CAT Scans
96
Made up of only one kind of matter that sets it apart from others
Pure Substances
Special Substances
Pure Sets
Composites
97
Sometimes ions can be formed when certain atoms of elements combine. They are called ...
Polyatomic Ions
Elemental Ions
Polyelectrons
Elemental Gains
98
The Bolded "g" tells us that CH
4
(
g
)
is a ...
Galaxy
Gas
Solid
Liquid
99
Periods or orbitals in the periodic table of elements are numbered from "___" - "___"
1-13
1-7
1-18
1-3
100
When a chemical reaction absorbs heat energy, it is called
A Endothermic Reaction
A Exothermic Reaction
101
By experimenting, Boyle was led to believe in the theory that ______ created years ago.
Froyda
Aristotle
Democritus
Alchemists
102
What are Electron Shells ?
Circular orbits that electrons follow around atomic nuclei
Ovule shaped orbits that protons follow around the nucleus
Shells that electron love to wear
Subatomic shells found at the beach
103
When a liquid changes to a gas, it is called ...
Vaporization
Condensation
Evaporation
Melting
104
What type of mixture is this? (salt dissolved in water)
Mechanical mixture (able to see the substance that makes it)
Solution (not able to see the substance that makes it)
Heterogeneous (able to see the substance that makes it)
Homogenous (not able to see the substance that makes it)
105
Properties are characteristics that can be used to describe a substance.
TRUE! Bang on!
FALSE! It is your house!
106
Ionic Compounds are
the elements that combine are: a metal and a non-metal
the elements that combine are: a metal and a metal
the elements that combine are: a metalloid and a non-metal
the elements that combine are: a metal and a metalloid
107
What safety symbol is this?
Caution: Explosive!
Caution: Biohazards!
Dangerous: Explosive!
Warning: Explosive!
108
John Dalton was the first to define matter as a pure substance, an element. And what else?
All atoms are made up of cells
He attempted to get rid of all atoms
He stated that each atom's weight differ from other atoms
He stated that alchemy was much more productive
109
Elements can be named based on their ...
People (Einsteinium)
Letters (O = (first letter) = Oxygen)
Places (Californium)
Latin Names (Au = Aurum = Gold)
110
Which one of these is a Nobel Gas; and which is a property of it?
Neon; very reactive
Neon; non-reactive
Argon; reactive
Helium; super reactive
111
6000 BC and 1000BC people began to experiment with metals that had high values like
Gold (its lustre, attractive color, and it didn't tarnish)
Iron (for weapons and armour)
Copper (it could be used to make pots, coins, and tools)
Oxygen (you need it to breathe)
112
What is "
c
"?
atom
electron
proton
neutron
113
A substance that can be pounded or rolled into large sheets is said to be
Conductible
Ductile
Awesome
Malleable
114
Groups or Families in the periodic table of elements are numbered from "___" - "___"
1-18
1-7
1-3
1-13
115
In molecular compounds there are _____ ions
Only positive
No
Many
Only negative
116
Snow turns into rain just before it reaches the ground; what type of change is this?
Chemical
Physical
117
What 2 elements are liquids at room temperature?
Mercury; Bromine
Bromine; Helium
Carbon; Neon
Mercury; Oxygen
118
How would you name Nitrogen and Lithium?
Li3N (Lithium Nitride)
Li1N (Lithium Dinitrogen)
N3Li (Nitride Lithium)
NLi3 (Nitrogen Trilithide)
119
Hantaro Nagaoka proposed this model of negative charged electrons orbiting a positive sphere:
Model of Electrodes
Electron Model
Planetary Reference
Raisin Bun Model
120
Matter is
anything that is important to you (it matters)
an affair or situation under consideration; a topic
anything that had mass and occupies space
Science
121
Chadwick discovered _________________.
Protons and Neutrons
Neutrons ONLY
Electrons
Protons ONLY
122
What could be a property of an element?
Color
Google
State
Eggplant
123
A mixture is _______.
A combination of pure substances
Dissolved oxygen in hydrogen
Suspension of particles
A mixture of elements
124
When a chemical reaction releases heat energy, it is called
A Endothermic Reaction
A Exothermic Reaction
125
What is the
red circled
part called (number 15.9994) ?
The number of protons
Atomic Number
Atomic Gravitational Number
Atomic Mass
126
Mendeleev was able to predict atomic masses and properties of elements that weren't discovered!
FALSE! No one can do that!
TRUE! What a god!
