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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 of high school chemistry semester one
Flashcards
50 cards
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Practice quiz
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Questions
50
Answers
1
Which letter identifies spherical orbitals?
d
s
f
p
2
Identify each type of alloy in the picture.
a - ionized b-neutral
a- substitutional b- interstitial
a- interstitial b- substitutional
a- interstitial b- bimetallic
3
What is a proposed explanation for an observation?
theory
scientific law
hypothesis
experiment
4
To express that my measurement is 10
-9
times the base unit, which prefix do I use?
nano
milli
Mega
micro
5
What is the most electronegative element?
Hydrogen
Helium
Cesium
Fluorine
6
Which is a
basic
unit of measurement in the SI system?
calorie
second
pound
liter
7
How did Mendeleev arrange the elements in his periodic table?
atomic number
atomic mass
color, light to dark
most reactive last
8
Convert from 55.4 m/s to km/min.
1012
9.23 X 10-4
3.32
3.32 X 106
9
Which rule states that an orbital may describe at most 2 electrons with opposite spins?
Hund's Rule
Heisenberg's Uncertainty Principle
Pauli Exclusion Principle
Aufbau Principle
10
Which is
not
a property of ionic compounds?
malleable
brittle when struck
high boiling point
good conductor when melted or dissolved
11
How many significant figures are in 207.0010
7
6
3
5
12
Which element has the greatest electron shielding of its valence electrons?
K
Na
Cs
Rb
13
Multiply 13.05 X 4.3 and express your answer to the correct number of significant figures.
56.115
56.11
56
56.1
14
How many sublevels are at the fourth principal energy level?
8
1
4
3
15
Which is not a state of matter?
air
gas
liquid
solid
16
When a neutral atom loses electrons, what is formed?
a neutral atom of another element
a polyatomic ion
an anion
a cation
17
Which correctly describes the composition of cesium-133?
55 p+, 55 e-, 78 n0
133 p+, 133 e-, 133n0
55 p+, 54 e-, 133n0
55 p+, 55 e-, 133n0
18
What does Te represent when you see it on the periodic table?
tellurium
thorium
technetium
titanium
19
What do the first and second arrow tell you about oxygen?
Symbol and mass
symbol and element name
atomic number and symbol
atomic number and mass
20
A reaction occurs and the products are different from the reactants, it is a _______________.
physical change
chemical change
21
When a mixture is uniform throughout, it is called a ____________________.
heterogenous mixture
pure substance
compound
homogeneous mixture
22
Which of the following is not a polar molecule?
H2O
CH4
CO
HF
23
Use VSEPR theory to predict the shape of NH
3
.
tetrahedral
trigonal pyramid
linear
trigonal planar
24
My balance read 16.3 g but the actual mass is 16.5 g. What is my percent error?
24%
1.2 %
10%
12%
25
The substances formed after any chemical reaction occurs are called _______________.
ashes
products
reactants
compounds
26
Which is an extensive property?
volume
specific heat
heat
density
27
Compared to the other two subatomic particles, which is completely true of the electron?
positive charge, smallest particle
negative charge, smallest particle
neutral, heaviest particle
positive charge, largest particle
28
Which type of compounds generally have the lowest melting and boiling points?
ionic
network covalent
molecular
metallic
29
4 g of H react completely with 12 g of carbon, how much methane (CH
4
) will form?
16 g
6.02 X 1023 g
32g
2g
30
What is the crystal arrangement of the picture on this page?
face centered cubic
hexagonal close packed
body centered cubic
primitive cubic
31
What is the weakest type of intermolecular attraction?
dispersion
hydrogen bond
dipole-dipole
ion-dipole
32
Who drafted the first scientific atomic theory in the late 18th century?
JJ Thomson
John Dalton
Ernest Rutherford
Democritus
33
This is not a clue that a chemical change has occurred.
production of a gas
heat gained or lost
change in size
formation of a precipitate
34
What is 20 degrees Celsius expressed in Kelvin?
-253K
53K
0K
293K
35
Express 10.06798 in three significant figures.
10
10.0
10.067
10.1
36
Correctly interpret this formula as to the elements it contains: H
2
SO
4
hydrogen and sulfur
a weak acid
two hydrogens, one sulfur and four oxygen atoms
two sulfur and four oxygen atoms
37
What is the density of a nugget of gold with mass of 100g and volume 5.18 cm
3
?
12.6 g/cm3
19.3 g/cm3
518 g/cm3
10 g/L
38
Where are nonmetals located on the periodic table?
lower left
middle
upper right
below the main table
39
Transition metals have unfilled orbitals in which block?
p
f
d
s
40
Which of the following is a chemical formula?
Se
Ar
CO
Be
41
What is the frequency of light with a wavelength of 6 X10
-4
m?
55 s-1
5 X 1011 s-1
1.8 X 105 s-1
2.998 X 108 m/s
42
Which is the correct electron configuration for Nitrogen?
1s22s22p3
1s22s22p2
1s22s22p6
1s22p3
43
How many valence electrons does Selenium have?
6
2
4
8
44
What is the correct formula for the ionic compound made of potassium and sulfur?
KS2
K3S2
KS
K2S
45
Which of the following is not a traditional area of study in chemistry?
inorganic
physical
nanotech
analytical
46
How does carbon-12 differ from carbon-13?
one less neutron
One less proton
There is no difference
one less electron
47
Which is a chemical property?
melting point
boiling point
color
ability to combust
48
Electron sharing occurs in molecules to give them the electron configuration of what elements?
halogens
noble gases
metalloids
alkali metals
49
How does atomic size change from left to right across a period of the periodic table?
increases and then decreases
stays the same
increases
decreases
50
The valence electrons in metals are modeled as this.
shared between two atoms
a sea of electrons
detached from the metal
locally attached to each atom
