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Chemistry review chapters 2-4 Flashcards | StudBud
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Chemistry review chapters 2-4
Chemistry review chapters 2-4
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states of matter, physical and chemical change, reading the periodic table
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Questions
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Answers
1
Which of these describes absolute zero?
O kelvin
O degrees Celcius
273 Kelvin
273 Degrees C
2
Which of the following is considered physical properties of a substance?
color
malleability and hardness
all of these
melting and boiling points
3
The smallest particle of an element that retains the properties of that element is a (an)
electron
atom
proton
neutron
4
All of the following are a physical change EXCEPT
melting
polishing
bending
rusting
5
who came up with the term atom?
Democritus
Dalton
Atomos
Mendeleev
6
the number of neutrons is...
29
63
92
34
7
Which of the following has 3 significant figures?
9099
9.30 x 10-7
0.090
0.009
8
Which state of matter expands when heated and is easy to compress?
gas
all of these
solid
liquid
9
The closeness of a measurement to its true value is
usefulness
accuracy
reproducibility
precision
10
This determines what an element is
the number of electrons
the atomic number
the number of neutrons
the mass number
11
all of the following show
Neither a chemical or physical change
a chemical change
both a chemical and physical change
a physical change
12
The subatomic particle with no charge is the...
electron
neutron
everything has a charge
proton
13
In lead 206 how many neutrons do you have?
124
82
288
206
14
What is the volume of 45.6g of silver if the density of silver is 10.5 g/cm
3
479cm3
4.34 cm3
none of the above
0.23cm3
15
which of these is a homogenous mixture?
salt water
chicken noodle soup
soil
sand and water
16
The atomic number is
Protons and Neutrons
protons
electrons
neutrons
17
An element has an atomic number of 76. The number of protons and electrons ina neutral atom is
76 protons and 76 electrons
152 protons and 76 electrons
76 protons and 0 electrons
38 protons and 38 electrons
18
what would best describe the image?
neither accurate nor precise
precise
accurate
both accurate and precise
19
To change degrees C into Kelvin you have to
it depends on celsius being negative
subtract 273
add 273
they don't correlate
20
The mass number is based on
number of protons and Neutrons
number of protons
number of protons, neutrons, and electrons
Number of Protons and electrons
21
which of the following is a heterogenous mixture?
saltwater
steel
air
soil
22
what is the density of an oject with a mass of 2.8g and a volume of 25ml in
g/cm
3
70
.112
8.93
25
23
if you have lead 206 the 206 is
the number of protons
the number of neutrons
number of electrons
none of the above
24
This guy stated that most of the atom is empty space, but there is a central nucleus.
Dalton
Mendeleev
Rutherford
Democritus
25
isotopes have
the same number of protons
a different number of protons and electrons
the same number of neutrons
the same number of electrons
26
Density is found by dividing
mass by volume
volume by mass
mass by area
area by mass
27
What would represent 2,008 in scientific notation?
2.008 x 10-3
2.0 X 104
2.008 x 103
2.008 x 104
28
A chemical change occurs when a peice of wood
decays
is split
is cut
is painted
