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Gen Chem Semester 1 Review Flashcards | StudBud
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Gen Chem Semester 1 Review
Gen Chem Semester 1 Review
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semester review for general chem
Flashcards
40 cards
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Practice quiz
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Questions
40
Answers
1
The modern periodic table is arranged in order of
atomic mass
boiling points
atomic number
melting points
2
How many sig figs are in the measurement 900.00?
5
2
1
4
3
What is the speed of an electromagnetic wave?
3.00 x 108 m/s
3.32 x 1038 m/s
3.00 x 10-8 m/s
0 m/s
4
How many sig figs are in the measurement 2500 cm?
1
4
3
2
5
What is this number in scientific notation? 3300
3.3 x 103
3.3 x 102
3.3 x 10-2
3.3 x 10-3
6
Emission of light from an atom occurs when an electron ____.
jumps from a lower to a higher energy level
falls into the nucleus
drops from a higher to a lower energy level
7
What are quanta of light called
photons
alpha particles
excitons
electrons
8
Chemistry is the study of ____ and the changes it undergoes
radiation
energy
matter
forces
9
Which is true about the a chemical reaction?
mass of products is greater than reactants
mass of reactants increases
mass of products equals reactants
mass of products is less than reactants
10
In the measurement 0.123 g, which is the estimatedigit?
3
0
2
1
11
What is the temperature of absolute zero measured in
o
C?
0 oC
32 oF
273 oC
-273 oC
12
Where are the alkali metals?
Group 2A
Group 1A
Group 7A
Group 8A
13
When an iron nail is ground into powder, its mass ____.
cannot be determined
decreases
stays the same
increases
14
Which of the following is a homogeneous mixture?
salt water
beef stew
soil
sand and water
15
The weight of an object....
is affected by gravity
is the same as its mass
is the same everywhere
16
Ionic compounds can conduct electricity when in the ______ state or dissolved in water.
gas
plasma
solid
liquid
17
Which type of radioactive particle is this?
positron emission
gamma emission
alpha particle
Beta e- emission
18
Elements that have properties of both metals and non-metals are called
transition metals
conductors
metalloids
metallics
19
Which scientist proposed the “Plum Pudding” model of the atom?
Rutherford
Thompson
Bohr
Dalton
20
Isotopes of the same element have different ____.
protons
electrons
neutrons
atomic number
21
The combination of two smaller nuclei to form a nucleus of greater mass is
fusion
radiocarbon dating
fission
decay
22
The nucleus of an atom is ____.
composed of protons and electrons
composed of protons and neutrons
negatively charged and has a low density
negatively charged and has a high density
23
The correct abbreviation for the unit mole is
g
M
mol
mo
24
If an ion has a charge of 2+ then it
gained two e-
lost two e-
gained two protons
lost two protons
25
Dalton said atoms are indivisible & atoms of an element are identical. It is now known that
atoms of an element must have the same mass
Dalton was completely correct
atoms are divisible
atoms of one element can have different protons
26
What element has the electron configuration 1s
2
2s
2
2p
6
3s
2
3p
1
?
P
O
B
Al
27
What type of nuclear reaction is pictured?
alpha decay
nuclear fusion
gamma decay
beta decay
28
Avogadro’s Number is equal to
6.02 x 10-23
6.02 x 1023
6.20 x 1023
9.8 m/s2
29
Which of the following elements is a transition metal?
oxygen
lead
chromium
sodium
30
What types of atomic orbitals are in the SECOND principal energy level?
s,p,d,f
s, p, d
s
s, p
31
How many sig figs are in the measurement 2503 m?
3
4
2
1
32
Which of the following is a physical change?
evaporation
explosion
rotting of food
corrosion
33
Which group contains the halogens?
Group 7A
Group 2A
Group 8A
Group 1A
34
Which represents a compound?
O-16
H
H-3
H2O
35
Which element has the larger atomic radius?
Cl
Li
K
Cs
36
Which of the following is NOT an example of matter?
air
water vapor
smoke
heat
37
A vapor is which state of matter?
gas
all of these
solid
liquid
38
The length of this paperclip should be recorded as
2.0 cm
2.3 cm
2 cm
2.30 cm
39
Molar mass is
equal to the numerical value of the average atomic mass
both of these
neither of these
The mass of 1 mole of a substance in grams
40
What is the shape of the 3p atomic orbital?
donut
two perpendicular dumbbells
dumbbell
sphere
