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Grade 9 Science > Chemistry- Unit Test > Flashcards

Chemistry- Unit Test Flashcards

1
Q

What is the Particle Thoery of Matter?

A
  1. All matter is made of individual particles
  2. the particles are always moving- the higher the temperature, the faster they move
  3. Particles are attracted to each other
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2
Q

What are the properties of a solid? What do the particles do?

A

the particles jiggle in place because they cant overcome the forces of attraction

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3
Q

What are the properties of a liquid? What do the particles do?

A

the particles have enough energy to move past each other, but cant completely overcome the forces of attraction so stay in contact

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4
Q

What are the properties of a gas? What do the particles do?

A

the particles have enough energy to overcome the forces of attraction and move independantly

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5
Q

What model of the atom is this? Was it first, second, third or last? + breif description

A

Model: Dalton

First model of an atom

shows: atoms of different elements have different properties

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6
Q

What is Daltons theory of his model?

A
  • all matter is made of small indivisable particles called atoms
  • all the atoms of an element are identical in properties such as size and mass
  • atoms of different elements have different properties
  • atoms of different elements can combine in specific ways to form new substances
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7
Q

What is the reason for a new model AFTER DALTONS MODEL?

A

They found atoms could be made to give off electrons

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8
Q

What model of the atom is this? Was it first, second, third or last? + breif description

A

Model: Thompson

Second Model ofthe Atom

Shows: all atoms must have electrons and since the atom has no overall electric charge, the sphere must be positive with negative electrons in it.

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9
Q

What was Thompsons theory of his model?

A
  • Through experimenting with electric currents in a glass tube, he reasoned that all atoms must have electrons and since the atom has no overall electric charge, the sphere must be positive with negative electrons in it

(chocolate chip muffin model)

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10
Q

What is the reason for a new model AFTER THOMPSON’S MODEL?

A
  • the gold foil experiment
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11
Q

What model of the atom is this? Was it first, second, third or last?

A

Model: Rutherford

Third Model of the Atom

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12
Q

What is Rutherfords theory of his model?

A
  • through the gold foil experiment he realized that most particles went straight through, but 1 in 10,000 bounced back because it had been deflected by something big and positively charged
  • he found the NUCLEUS- it ha most of the atoms mass and was very small compared to the size of the whole atom
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13
Q

What was the reason for the new model AFTER RUTHERFORDS MODEL?

A
  • each atom gives off specific colours of light when excited by heat or electricity by jumping through different energy levels
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14
Q

What model of the atom is this? Was it first, second, third or last?

A

Model: Bohr

Fourth Model of the Atom

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15
Q

What was Bohr’s theory with his model?

A
  • electrons were in different energy levels and could jump between levels by gaining or losing energy
  • there is a maximum number of electrons in each shell
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16
Q

What model of the atom is this? Was it first, second, third or last? + it’s theory

A

Model: Modern Quantum Model

Most Modern model of the atom

Theory:

  • electrons exist in specific energy levels but as a cloud instead of tiny points
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17
Q

What did Rutherford do in his gold foil experiment?

A

He directed a stream of small dense particles from a radioactive source at a piece of gold foil only a few atoms thick

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18
Q

What did Rutherford expect to happen in his experiment?

A

He expected that the particles would go straight through the foil because Thompson’s model showed small light electrons in a positive matrix

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19
Q

What happened in Rutherfords gold foil experiment?

A
  • he realized 1 in 10,000 bounced back because they must have hit something very small but very dense
  • the new model shows the majority of the mass is concentrated in a small “nucleus” at the center with electrons surrounding it
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20
Q

What is the location, charge and atomic mass of a PROTON?

A

Location: Nucleus

Charge: +1 (positive)

Atomic Mass: 1 amu

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21
Q

What is the location, charge and atomic mass of a NEUTRON?

A

Loation: Nucleus

Charge: 0 (neutral)

Atomic Mass: 1amu

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22
Q

What is the location, charge and atomic mass of an ELECTRON?

A

Location: around the nucleus

Charge -1 (negative)

Atomic Mass: About equal to 0 amu

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23
Q

What is the atomic number?

A

Atomic Number = Number of Protons

(the number of protons is the atomic number)

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24
Q

What is the number of protons equal to?

A

Number of Protons = Number of Electrons

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25
Q

What does the atomic mass equal?

A

Atomic Mass= # of Protons + # of Neutrons

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26
Q

Do metals gain or lose electrons?

A

Metals LOSE electrons

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27
Q

Do non-metals gain or lose electrons?

A

Non-metals GAIN electrons

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28
Q

Metals:

  1. What colour are they?
  2. Can they conduct electricity or heat?
  3. What state are they at room temperature?
  4. What texture are they in general?
  5. What do they react with?
A
  1. Shiny and grey or silver except gold and copper
  2. good conductors of electricity and heat
  3. solid at room temperature except mercury- its a liquid
  4. most are malleable and ductile
  5. most react with air, some with water
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29
Q

Non-metals:

  1. What colour are they?
  2. Can they conduct electricity or heat?
  3. What state are they at room temperature?
  4. What texture are they in general?
  5. Additional Info?
A
  1. brightly coloured
  2. poor conductors of electricity and heat
  3. Most are gases, some are acids and the solids are brittle (when in solid form)
  4. brittle
  5. 11 gases, 5 solids, 1 liquid, most are brittle
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30
Q

Metalloids:

  1. What colour are they?
  2. Can they conduct electricity or heat?
  3. What state are they at room temperature?
  4. What texture are they in general?
  5. Additional Info?
A
  1. brittle, grey and dull
  2. semiconductors of electricity and heat
  3. solid at room temperature
  4. Brittle and dull
  5. they have properties between metals and non-metals
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31
Q

Do metalloids gain or lose electrons?

A

Metalliods can be unpredictable in whether they gain or lose electrons when making ions

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32
Q

What is the atomic number?

A

the number of protons (which is equal to the number of electrons)

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33
Q

How many elements are there naturally and man made?

A

92 naturally occuring elements and 26man made elements

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34
Q

What is the charge of a pure element?

A

All atoms are nuetral so the number of portons is equal to the number of electrons.

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35
Q

What is the atomic mass equal to?

A

Atomic Mass=Protons+Neutrons

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36
Q

What are isotopes?

A

They are isotopes with the same number of protons, so are the same element, but have a different number of neutrons, therefore a different atomic mass. The atomic mass of an element on the periodic table is a weighted percentage of its isotopes.

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37
Q

What is an atom?

A

The simpliest unit of measure and cannot be broken down by phsycial means.

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38
Q

What is a molecule?

A

Two or more atoms joined together chemically that move as a single unit. ex. H2O

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39
Q

What is an ion?

A

An atom that has gained or lost an electron.

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40
Q

What is a particle?

A

a general term describing the smallest independant thing in a sample (could be atoms, molecules or ions)

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41
Q

What is a compound?

A

A sample made up of only 1 type of molecule where each molecule is made up of more than 1 type of atom.

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42
Q

What is an element?

A

A sample of matter made up of only 1 type of atomeg. a piece of sodium is made up of only sodium atoms

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43
Q

What is a pure substance?

A

A sample made entirely of the same type of atom

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44
Q

What is a mixture?

A

2 or more types of particles

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45
Q

What does homogeneous mean?

A

It has only 1 phase (state) and the properties are the same throughout (looks like its made of 1 thing)

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46
Q

What does heterogeneous mean?

A

2 or more phases (states) and the properties differ at different states (looks like its made of different things)

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47
Q

what is a solution?

A

One substance dissolved in another

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48
Q

What is a mechanical mixture?

A

A mixture made of 2 or more solids

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49
Q

What are the 4 Characteristic Properties of iron?

A
  1. fairly common
  2. strong
  3. can be molded/malleable
  4. reacts with oxygen (rusts with oxygen)
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50
Q

What are the Characteristic Properties of carbon?

A
  1. main building block of life
  2. several forms (graphite, diamond, coal)
  3. usually fairly hard
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51
Q

What are the Characteristic Properties of hydrogen?

A
  1. most common element in the universe
  2. very light
  3. very flammable
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52
Q

What are the Characteristic Properties of oxygen?

A
  1. it is a gas
  2. one fifth air is oxygen
  3. essential to life
  4. non toxic
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53
Q

What are the Characteristic Properties of sodium?

A
  1. it is a soft metal
  2. reacts with air and water
  3. low melting metal
  4. salt
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54
Q

What are the characteristic properties of chlorine?

A
  1. gas
  2. reacts with water
  3. toxic
  4. antibacterial
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55
Q

What is a physcial property?

A

a characteristic of a substance that can be observed or measured

56
Q

What is a chemical property?

A

the ability of a substance to change into a new substance or substances

57
Q

What are some physcial changes?

A

involves a change to a physcial

  • change in form: breaking into pieces
  • change in state: liquid to gas
  • change in solubility: solid disolving in water

*note that each example retains the same type of element/compound and doesnt create anything new*

58
Q

What are some chemical changes an dsome signs of chemical changes?

A

Involves creating a new element/ compound ex. changing the connections between atoms)

  • burning wood: CO2 and H2O are created
  • baking soda and vinegar: creates bubbles
  • sodium and water: H2 is created

Signs of chemical changes:

  • bubbles(not boiling)
  • heat and light are created (energy is released)
  • colour changes
  • a precipitate (solid) forms when mixing liquids
  • the change is difficult to reverse
59
Q

How do you test for oxygen?

A

Put a glowing splint in a test tube of oxygen and the splint should reignite because oxygen feeds fire and combustion

60
Q

How do you test for carbon dioxide?

A

put a flaming splint in a test tube of carbon dioxide and the splint should be extinguished

61
Q

How do you test for hydogen?

A

put a flaming splint at the mouth of a test tube filled with hydrogen, and the flame should quickly grow and make a loud pop.

62
Q

How do you calculate mass?

A

Density*Volume

63
Q

How do you calculate density?

A

Mass/Volume

64
Q

How do you calculate volume?

A

Mass/density

65
Q

How do you name ionic compounds?

A

it is a metal with a non metal

From fomula to words:

  1. write out the first element
  2. write out the second element with ide as the ending

From Words toFormula:

  1. find the charges for both elements and use the crossover rule to find how many of each atom are needed
  2. write out formula with element symbols
66
Q

How do you name ionic compounds with a transisition metal?

A

Transistion metal with nonmetal

From formula to words:

  1. find the charge of the 2nd element and multiply it by the number of atoms in the formula (subscript) and put it in roman numerals behind the first element
  2. write the second element with the ending changed to ide

from Written to formula

  1. the roman numerals show the charge of the first element and find charge of the second element
  2. use the cross over rule and write out the formula
67
Q

What are covalent compounds and how do you name them?

A

they are bonds between 2 nonmetals and tey share electrons.

Formula to Written:

  1. if there is more than 1 atom from the first element the add the right prefix to the first element, the right the prefix and second element for the number of atoms there are.

Written to formula:

  1. prefix shows the number of atoms for each element then write the element symbol and the right amount indicated by the prefix
68
Q

What are the prefixes?

A

1= mono

2= di

3= tri

4= tetra

5= penta

6= hexa

69
Q

Draw the Bohr-Rutherford and Lewis dot symbols for the first 20 elements and write out their ionic charges

A

No really. go do it. now. Ace that Thang!!! :D

70
Q

Why do we use Bohr-Rutherford and Lewis dot symbols?

A

we use them to show ionic and covalent bonds and to show which electrons are shared, gained or lost

71
Q

What is a diatomic element?

A

an element that naturally exisits as 2 atoms (pairs) and are stated as just elements

72
Q

What are groups and periods on the peridoic table?

A

Groups is a row and as you move across a group you gain an electron on the outer shell

Periods are columns and as you move down a period you gain a shell

73
Q

What are some trends in the periodic table?

A
  • metals are to the left of the staircase and non metals are to the right. the staircase is made of mettaloids
  • they are in order of increasing atomic numbers
74
Q

What is Boiling Point?

A

the point that if an element is heated or cooled, it will boil at

75
Q

What is combustability?

A

the ability of a substance to react with oxygen to create heat and light

76
Q

What is conductivity?

A

The ability for a substance to conduct electricity and heat

77
Q

What is reactivity?

A

the ability of an element to react

78
Q

What is ductility?

A

the ability of a substance to be stretched into a long wire

79
Q

What is Viscosity

A

the resistance of a fluid to flow

80
Q

What is form?

A

the shape of a substance or object

81
Q

What is solubility?

A

how easily a substance dissolves in water

82
Q

What is lustre?

A

the shine of an object

83
Q

What is transparency?

A

whether you can see through an object or not (transparent, translucent or opaque)

84
Q

What is the atomic number?

A

the number of protons (which is equal to the number of electrons)

85
Q

How many elements are there naturally and man made?

A

92 naturally occuring elements and 26man made elements

86
Q

What is the charge of a pure element?

A

All atoms are nuetral so the number of portons is equal to the number of electrons.

87
Q

What is the atomic mass equal to?

A

Atomic Mass=Protons+Neutrons

88
Q

What are isotopes?

A

They are isotopes with the same number of protons, so are the same element, but have a different number of neutrons, therefore a different atomic mass. The atomic mass of an element on the periodic table is a weighted percentage of its isotopes.

89
Q

What is an atom?

A

The simpliest unit of measure and cannot be broken down by phsycial means.

90
Q

What is a molecule?

A

Two or more atoms joined together chemically that move as a single unit. ex. H2O

91
Q

What is an ion?

A

An atom that has gained or lost an electron.

92
Q

What is a particle?

A

a general term describing the smallest independant thing in a sample (could be atoms, molecules or ions)

93
Q

What is a compound?

A

A sample made up of only 1 type of molecule where each molecule is made up of more than 1 type of atom.

94
Q

What is an element?

A

A sample of matter made up of only 1 type of atomeg. a piece of sodium is made up of only sodium atoms

95
Q

What is a pure substance?

A

A sample made entirely of the same type of atom

96
Q

What is a mixture?

A

2 or more types of particles

97
Q

What does homogeneous mean?

A

It has only 1 phase (state) and the properties are the same throughout (looks like its made of 1 thing)

98
Q

What does heterogeneous mean?

A

2 or more phases (states) and the properties differ at different states (looks like its made of different things)

99
Q

what is a solution?

A

One substance dissolved in another

100
Q

What is a mechanical mixture?

A

A mixture made of 2 or more solids

101
Q

What are the 4 Characteristic Properties of iron?

A
  1. fairly common
  2. strong
  3. can be molded/malleable
  4. reacts with oxygen (rusts with oxygen)
102
Q

What are the Characteristic Properties of carbon?

A
  1. main building block of life
  2. several forms (graphite, diamond, coal)
  3. usually fairly hard
103
Q

What are the Characteristic Properties of hydrogen?

A
  1. most common element in the universe
  2. very light
  3. very flammable
104
Q

What are the Characteristic Properties of oxygen?

A
  1. it is a gas
  2. one fifth air is oxygen
  3. essential to life
  4. non toxic
105
Q

What are the Characteristic Properties of sodium?

A
  1. it is a soft metal
  2. reacts with air and water
  3. low melting metal
  4. salt
106
Q

What are the characteristic properties of chlorine?

A
  1. gas
  2. reacts with water
  3. toxic
  4. antibacterial
107
Q

What is a physcial property?

A

a characteristic of a substance that can be observed or measured

108
Q

What is a chemical property?

A

the ability of a substance to change into a new substance or substances

109
Q

What are some physcial changes?

A

involves a change to a physcial

  • change in form: breaking into pieces
  • change in state: liquid to gas
  • change in solubility: solid disolving in water

*note that each example retains the same type of element/compound and doesnt create anything new*

110
Q

What are some chemical changes an dsome signs of chemical changes?

A

Involves creating a new element/ compound ex. changing the connections between atoms)

  • burning wood: CO2 and H2O are created
  • baking soda and vinegar: creates bubbles
  • sodium and water: H2 is created

Signs of chemical changes:

  • bubbles(not boiling)
  • heat and light are created (energy is released)
  • colour changes
  • a precipitate (solid) forms when mixing liquids
  • the change is difficult to reverse
111
Q

How do you test for oxygen?

A

Put a glowing splint in a test tube of oxygen and the splint should reignite because oxygen feeds fire and combustion

112
Q

How do you test for carbon dioxide?

A

put a flaming splint in a test tube of carbon dioxide and the splint should be extinguished

113
Q

How do you test for hydogen?

A

put a flaming splint at the mouth of a test tube filled with hydrogen, and the flame should quickly grow and make a loud pop.

114
Q

How do you calculate mass?

A

Density*Volume

115
Q

How do you calculate density?

A

Mass/Volume

116
Q

How do you calculate volume?

A

Mass/density

117
Q

How do you name ionic compounds?

A

it is a metal with a non metal

From fomula to words:

  1. write out the first element
  2. write out the second element with ide as the ending

From Words toFormula:

  1. find the charges for both elements and use the crossover rule to find how many of each atom are needed
  2. write out formula with element symbols
118
Q

How do you name ionic compounds with a transisition metal?

A

Transistion metal with nonmetal

From formula to words:

  1. find the charge of the 2nd element and multiply it by the number of atoms in the formula (subscript) and put it in roman numerals behind the first element
  2. write the second element with the ending changed to ide

from Written to formula

  1. the roman numerals show the charge of the first element and find charge of the second element
  2. use the cross over rule and write out the formula
119
Q

What are covalent compounds and how do you name them?

A

they are bonds between 2 nonmetals and tey share electrons.

Formula to Written:

  1. if there is more than 1 atom from the first element the add the right prefix to the first element, the right the prefix and second element for the number of atoms there are.

Written to formula:

  1. prefix shows the number of atoms for each element then write the element symbol and the right amount indicated by the prefix
120
Q

What are the prefixes?

A

1= mono

2= di

3= tri

4= tetra

5= penta

6= hexa

121
Q

Draw the Bohr-Rutherford and Lewis dot symbols for the first 20 elements and write out their ionic charges

A

No really. go do it. now. Ace that Thang!!! :D

122
Q

Why do we use Bohr-Rutherford and Lewis dot symbols?

A

we use them to show ionic and covalent bonds and to show which electrons are shared, gained or lost

123
Q

What is a diatomic element?

A

an element that naturally exisits as 2 atoms (pairs) and are stated as just elements

124
Q

What are groups and periods on the peridoic table?

A

Groups is a row and as you move across a group you gain an electron on the outer shell

Periods are columns and as you move down a period you gain a shell

125
Q

What are some trends in the periodic table?

A
  • metals are to the left of the staircase and non metals are to the right. the staircase is made of mettaloids
  • they are in order of increasing atomic numbers
126
Q

What is Boiling Point?

A

the point that if an element is heated or cooled, it will boil at

127
Q

What is combustability?

A

the ability of a substance to react with oxygen to create heat and light

128
Q

What is conductivity?

A

The ability for a substance to conduct electricity and heat

129
Q

What is reactivity?

A

the ability of an element to react

130
Q

What is ductility?

A

the ability of a substance to be stretched into a long wire

131
Q

What is Viscosity

A

the resistance of a fluid to flow

132
Q

What is form?

A

the shape of a substance or object

133
Q

What is solubility?

A

how easily a substance dissolves in water

134
Q

What is lustre?

A

the shine of an object

135
Q

What is transparency?

A

whether you can see through an object or not (transparent, translucent or opaque)

Grade 9 Science (5 decks)

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