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Grade 9 Chemistry Review Flashcards | StudBud
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Grade 9 Chemistry Review
Grade 9 Chemistry Review
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Review questions for chemistry unit test
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1
In what state are most elements in the Periodic Table?
gas
plasma
liquid
solid
2
How many valence electrons does this group have?
1
3
4
2
3
What is shown below?
precipitate formation
physical change
conduction
solidification
4
Who conducted this experiment?
Bohr
Rutherford
Dalton
Thomson
5
Who proposed that "atoms cannot be created or destroyed"?
Newton
Rutherford
Dalton
Copernicus
6
What type of bond is formed?
dipole
ionic
covalent
hydrogen
7
What is the pop can?
malleable
brittle
transparent
lustrous
8
How many
oxygen
atoms are in
2
molecules of
Sn
3
(NO
3
)
4 ?
3
4
12
24
9
Who is credited with the following model of the atom?
Rutherford
Bohr
Schrodinger
Democritus
10
Who is responsible for the atomic theory illustrated below?
Dalton
Bohr
Leucippus
Thomson
11
What molecule could this be?
H2O
CO2
F2
NH3
12
What property does the following chemical have?
insoluble
conducts electricity as a solid
malleable
conducts electricity when dissolved
13
What is the chemical formula of ...
Ca2Cl2
Ca
CaCl
CaCl2
14
What type of ions do the elements in this group form?
1-
3+
1+
2+
15
If the test tube contains hydrogen gas, what will happen?
nothing
a "pop" sound will be heard
the flame will go out
the flame will get brighter
16
What property is shown?
rusting
reaction with acid
oxidation
flammability
17
Which halogen is not a gas at room temperature?
chlorine
hydrogen
fluorine
bromine
18
What property is shown?
conductivity
melting
malleability
viscosity
19
What information is obtained from atomic number?
# of electrons
# of protons, # of electrons
# of neutrons
# of protons
20
What type of bonding do elements in this group participate in?
ionic
dipole
hydrogen
covalent
21
What is shown here?
atoms
crystal lattice
ions
molecular compound
22
What is the name of this atomic theory?
planetary
nuclear
Greek
plum pudding
23
What happens to the energy of electrons with increasing distance from the nucleus?
increases
stays the same
decreases
decreases by a factor of 10
24
How many groups are these elements placed in?
9
5
8
10
25
Which Russian is shown here?
Mendeleev
Peter the Great
Tzar Nicholas
Igor
26
What is the name of this group?
noble gases
transition metals
halogens
alkali metals
27
What is the correct chemical formula of heptanitrogen decahydride?
N7H10
N6H10
N6H8
N7H8
28
What does the following picture show?
compound
element
atom
ion
29
Which states of matter are shown?
solid, liquid, gas
gas
solid
liquid
30
Which gas is present?
hydrogen
carbon dioxide
oxygen
carbon monoxide
31
what type of mixture is shown?
alloy
mechanical
suspension
heterogeneous
32
What type of bonding is shown here?
hydrogen
dipole
ionic
covalent
33
What is formed below?
an atom
a compound
a cation
an anion
34
How many valence electrons does this atom have?
none
18
7
8
35
Which change of state is shown?
condensation
freezing
melting
evaporation
36
Which subatomic particles participate in chemical reactions?
electron cloud
valence
first energy level
all
37
Which state of matter is seen?
gas
liquid
none
solid
38
This scientist discovered the neutron...
Dalton
Chadwick
Thomson
Rutherford
39
What chemical change is shown?
reaction with water
reaction with snow
reaction with acid
reaction with oxygen
40
What is the name of
monocalcium monochloride
calcium chlorine
calcium monochloride
calcium chloride
41
What type of mixture is shown?
pizza
colloid
mechanical
homogeneous
42
Which subatomic particles are found in the nucleus?
protons & neutrons
neutrons
protons and electrons
protons
43
What type of mixture is shown?
heterogeneous
suspension
solution
colloid
44
Which scientist used this?
Thomson
Bohr
Democritus
Dalton
45
Which element is this?
magnesium
fluorine
nitrogen
oxygen
46
Who coined the term "atom"?
Ptolemy
Schrodinger
Leucippus
Thomson
47
Which atomic theory is shown below?
plum pudding
quantum mechanical
nuclear
billiard ball
48
The molecule has the chemical formula, NH
3
. What type of compound is it?
crystal lattice
none
ion
molecular
49
What is the oxidation number of this group?
1+
2-
0
1-
50
What type of motion do gas particles have?
all
vibrational
rotational
translational
51
What is shown below?
suspension
mechanical
solution
colloid
52
What is shown below?
mixture
pure substance
homogeneous
suspension
53
What type of bond is shown?
dipole
hydrogen
covalent
ionic
54
What does the following picture show?
compound
ion
element
mixture
