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