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Chemistry Semester 1 Review Flashcards | StudBud
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Chemistry Semester 1 Review
Chemistry Semester 1 Review
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Review chemistry semester one
Flashcards
80 cards
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Practice quiz
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Questions
80
Answers
1
Define Organic Chemistry.
any substance that has a definite composion.
flowers growing on your house.
the use of math to observe principles.
the study of most carbon-containing compounds.
2
Which is
not
a property of ionic compounds?
high melting point
malleable
brittle
good conductor of electricity
3
Determine the molecular geometry of HCN.
Linear
Trigonal planar
Trigonal Pyramidal
Tetrahedral
4
Define precision
the closeness of two or more measurements to each other
to register small physical amounts ordifferences
how close a measurement is to the true value
The smallest measurable change in a quantity
5
What is the density of a nugget of gold with mass of 100g and volume 5.18 cm
3
?
518 g/cm3
10 g/L
12.6 g/cm3
19.3 g/cm3
6
Express 10.06798 in three significant figures.
10.067
10.1
10.0
10
7
Which atomic orbitals are dumbbell shaped?
S
F
P
D
8
Which correctly describes the composition of cesium-133?
55 p+, 54 e-, 133n0
55 p+, 55 e-, 133n0
55 p+, 55 e-, 78 n0
133 p+, 133 e-, 133n0
9
Which is an extensive property?
density
volume
heat
specific heat
10
What are isotopes?
atoms with an electric charge
forms of the same element with a different neutron number
atoms that have lost or gained an electron
identical atoms
11
Which is the correct electron configuration for Nitrogen?
1s22s22p2
1s22s22p3
1s22p3
1s22s22p6
12
This is not a clue that a chemical change has occurred.
change in size
formation of a precipitate
heat gained or lost
production of a gas
13
When a neutral atom loses electrons, what is formed?
a polyatomic ion
an anion
a cation
a neutral atom of another element
14
Alkali Earth Metals
Group four of the Periodic Table
Group two of the Periodic Table
Group three of the Periodic Table
Group one of the Periodic Table
15
How many significant figures are in 207.0010
5
3
6
7
16
To find the number of neutrons, you must
subtract the atomic number from the atomic mass
protons - electrons
subtract the atomic mass from the atomic number
atomic number - atomic mass
17
All the elements in the same group have the same
Atomic masss
Atomic numbr
Energy shells
Valence electrons
18
Define Intensive Property
Property that depend on the amount of material in the system
Can be observed, changed, or measured
Depends on the amount of matter
A property that don't depend on the amount of matter present
19
What is the relationship between frequency and wavelength?
the lower the frequency the higher the wavelength
the higher the frequency the lower the wavelength
the higher the frequency the higher the wavelength
the lower the frequency the lower the wavelength
20
What experiment did Millikan do?
gold foil experiment
neutron experiment
oil drop experiment
atomic theory
21
Multiply 13.05 X 4.3 and express your answer to the correct number of significant figures.
56
56.115
56.1
56.11
22
Determine the molecular geometry of H2O.
Bent
Linear
Trigonal planar
Tetrahedral
23
A reaction occurs and the products are different from the reactants, it is a _______________.
physical change
chemical change
24
Conver 8000cm to m
80m
8m
i don't knowwww
800m
25
Halogens
Group 18
Group 19
Group 16
Group 17
26
The study of matter is
meteorology
chemistry
geology
biology
27
Weight and mass are the same thing.
False
True
28
Which of the following is not a traditional area of study in chemistry?
nanotech
physical
analytical
inorganic
29
Is this an intensive or extensive property?
Extensive
Intensive
30
Elements in the same period share what attribute?
They have the same number of occupied energy levels
Size
Number of valence electrons
Number of protons
31
Has a molecular geometry that is trigonal pyramidal.
PH3
CH4
CO
HF
32
Who is known for first scientific atomic theory in the late 18th century?
JJ Thomson
Ernest Rutherford
Democritus
John Dalton
33
How many neutrons in an atom with this nuclear symbol?
327
92
143
235
34
What is the central nucleus composed of?
protons and electrons
protons and neutrons
electrons and neutrons
electron and atoms
35
Which rule states that an orbital may describe at most 2 electrons with opposite spins?
Heisenberg's Uncertainty Principle
Pauli Exclusion Principle
Aufbau Principle
Hund's Rule
36
the atomic number is equal to...
the number of neutrons in the nucleus
sum of the protons plus the number of neutrons
the number of nucleus' in the proton
the number of protons in the nucleus
37
Where are nonmetals located on the periodic table?
below the main table
upper right
middle
lower left
38
The Heisenberg Uncertainty Principle states that
Energy is made of quanta
We can measure a particles position and velocity exactly
Radiation is made up of quanta
We cant measure a particles position and velocity exactly
39
Chemical or Physical change?
Chemical
Physical
40
Which describes extensive property?
A chemical property that depends on color and weight
A physical property that depends on volume and mass
A chemical property that depends on mass and volume.
A physical property that depends on density and heat
41
Convert from 55.4 m to km.
55400
0.0554
0.554
5540
42
The further away from the nucleus, the _____ energy an electron has.
More
Less
Equal
Lower
43
What is a proposed explanation for an observation?
hypothesis
experiment
theory
scientific law
44
What did JJ Thomson discover?
Something that makes up everything
The atom
The Nucleus
The electron
45
What do the first and second arrow tell you about oxygen?
Symbol and mass
atomic number and symbol
atomic number and mass
symbol and element name
46
Determine the molecular geometry of CH4.
Trigonal Pyramidal
Tetrahedral
Linear
Trigonal planar
47
How does carbon-12 differ from carbon-13?
There is no difference
One less proton
one less electron
one less neutron
48
How many electrons in an atom with this nuclear symbol?
327
92
235
143
49
Write this atom in dash or hyphen notation
Boron - 6
None of the above
Boron - 5
Boron - 11
50
Which is a chemical property?
tendency to rust
melting point
boiling point
color
51
An atom is the.....
positively charged
smallest particle of an element
the average atomic mass
negatively charged
52
What is the molecular geometry of BF
3
?
Trigonal Planar
Linear
Square Pyramidal
Bent
53
electronegativity...
increases across the period
has nothing to do with the period
decreases across the period
stays the same across the period
54
What is the most electronegative element?
Fluorine
Hydrogen
Helium
Cesium
55
This determines the identity of an atom.
Number of protons
Number of valence electrons
Number of electrons
Number of neutrons
56
The Aufbau principle states that...
Every orbital on an energy level needs an electron.
Electrons must be paired with opposite spins.
The lowest available energy level is filled first.
57
heterogeneous or homogeneous: pure water
homogeneous
heterogeneous
58
How many valence electrons does Selenium have?
8
4
2
6
59
Transition metals are located in which block?
s
d
f
p
60
Chemical or physical
Physical change
Chemical change
61
Define accuracy
to register small physical amounts ordifferences
how close a measurement is to the true value
the closeness of two or more measurements to each other
The smallest measurable change in a quantity
62
Compared to the other two subatomic particles, which is completely true of the electron?
neutral, heaviest particle
positive charge, smallest particle
negative charge, smallest particle
positive charge, largest particle
63
Use VSEPR theory to predict the shape of NH
3
.
trigonal pyramid
trigonal planar
linear
tetrahedral
64
Which letter identifies spherical orbitals?
p
f
s
d
65
What does Ductile mean?
Can be stretched into wire
Explodes when immersed in water
Easily pressed flat
Can be crushed
66
Which is a
basic
unit of measurement in the SI system?
pound
liter
calorie
second
67
Density is measured by...
Dividing Mass by Length
Adding Volume and Mass
Dividing Volume by Mass
Multiplying Volume by Mass
68
Why do atoms chemically combine with atoms of other elements?
To produce explosions
To maintain equal number of protons and electrons
To have a valence shell of 10 electrons
to have a complete outer energy level
69
How does atomic radii change from left to right across a period of the periodic table?
increases and then decreases
decreases
stays the same
increases
70
What is the correct Lewis Dot Structure?
D
B
C
A
71
My balance read 16.3 g but the actual mass is 16.5 g. What is my percent error?
12%
10%
1.2 %
24%
72
When a mixture is uniform throughout, it is called a ____________________.
heterogenous mixture
homogeneous mixture
compound
pure substance
73
What is the Lewis Dot Structure for HCN?
C
D
A
B
74
Which element has the lowest electronegativity?
Cs
K
Rb
Na
75
How many protons in an atom with this nuclear symbol?
235
92
143
327
76
Physical or Chemical change?
Chemical
Physical
77
Physical change or chemical change
chemical change
Physical change
78
Find the density of Silver if a block of silver has a volume of 2 cm
3
and 21 grams.
10.5
11
12
9
79
Electron sharing occurs in molecules to give them the electron configuration of what elements?
noble gases
halogens
alkali metals
metalloids
80
A logical approach to solving problems...
Scientific Method
Martin Method
Scientific steps
Hypothesis
