an objects weight is the measure of

the force with which it is attracted by gravity

Which statement best describes an element?

a pure substance made up of only one kind of atom

Chlorine has atomic number 17 and mass number 35. It has

17 protons, 17 electrons, and 18 neutrons.

In division and multiplication, the answer should have the same number of significant figures as the

number in the calculation with the fewest significant figures.

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Honors chemistry 1 midterm

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1
Which of these shows SI unit prefixes arranged in order frotn smallest to largest?
kilo, milli, centi
milli, centi, kilo
centi, milli, kilo
kilo, centi, milli
2
Which of the following is an intensive property of matter?
energy content
volume
mass
density
3
Phosphorus-33 (atomic number 15) contains
18 protons
18 nuetrons
33 protons
33 nuetrons
4
An aluminum isotope consists of 13 protons, 13 electrons, and 14 neutrons. Its mass number is
27
13
40
14
5
Thomson's experiment showed that the charge-to-mass ratio of electrons was
the same in all gases
greater with noble gases than for other gases
dependent on the elementś atomic mass
less with noble gases than for other gases
6
What is the highest occupied energy level in an atom of strontium in its ground state?
n=4
n=3
n=5
n=6
7
the units of molar mass are
mol/g
amu/g
amu/mol
g/mol
8
an objects weight is the measure of
the pressure exerted on a scale
the amount of material per unit volume
the force causing the object to move
the force with which it is attracted by gravity
9
The theory that light behaves as a wave is best illustrated by the
emission of electromagnetic radiation by a hot body.
interference of light
photoelectric effect
lyman, balmer, and paschen series
10
Which state of matter is composed of atoms that have lost many of their electrons? solid
liquid
gas
solid
plasma
11
The unit cm3 is used to express
mass
length
volume
time
12
What is the correct electron configuration for a ground-state atom with 7 electrons?
Is²2s²2p²3s¹
I s²2s⁵
I s²2s³2p²
ls²2s²2p³
13
Expressed in scientific notation, 0030 m is
9.3 x 10⁻3
9.30 x 10⁻2
93 x 10⁻3
9.30 x 10⁻4
14
The basic principles of atomic theory were first conceived by
dalton
avogadro
rutherford
bohr
15
0.12+1.8+0.562
2.48
2.5
2.582
2.4
16
When electrons change energy states, the amount of energy given off or absorbed is equal to
hc
cv
n
hv
17
The smallest unit of matter that retains the properties of that 'natter is
a mixture
a molecule
an atome
a compound
18
In which of the following measurements are all the zeros considered to be nonsignificant figures?
506
400.
0.0037
60.0
19
Every pure chemical compound consists of two or more elements that
are combined in any proportion
can be seperated by physical change
are combined chemically
cannot be seperated
20
A scientist is working with mathematical and computer models to learn about the principles at work in a chemical react
physical chemistry
analytical chemistry
theoretical chemistry.
biochemistry
21
Which of the following changes is a physical change of matter?
paper burning
a nail rusting
a spoon tarneshing
warer evaporating
22
When 6.02 x 1023 is multiplied by 9.1 x 10-31, the product is
5.5 x 10⁻7
5.5 x 10⁻8
5.5 x 10 ⁻53
5.5 x 10⁵5
23
If some measurements agree closely with each other but differ widely from the actual value, these measurements are
precise but not accurate
neither precise or accurate
both accurate and precise
accurate but not precise
24
which of these is not a si unit
ampere
kelvin
pound
meter
25
the si base unit for mass is
cubic meter
meter
kilogram
gram
26
The mass of 2.0 mol of oxygen atoms (atomic mass 16.00 amu) is
64g
16 g
48g
32g
27
An element near argon in the periodic table would probably be
a good electrical conductor
shiny and malleable
a poor heat conductor
solid
28
An orbital that would never exist in the quantum description of an atom is
8s
6d
3f
3d
29
Which statement best describes an element?
a substance made up of only one kind of atom
a pure substance made up of only one kind of atom
any combination of two or more atoms of different types
any kind of crystal
30
Chlorine has atomic number 17 and mass number 35. It has
17 protons, 17 electrons, and 18 neutrons.
18 protons, 18 electrons, and 17 neutrons.
35 protons, 35 electrons, and 17 neutrons.
17 protons, 17 electrons, and 52 neutrons.
31
In division and multiplication, the answer should have the same number of significant figures as the
number in the calculation with the fewest significant figures.
number in the calculation with the most significant figures.
total number of significant figures in the calculation.
average number of significant figures in the calculation.
32
Which of these is an example of an extensive property?
density
color
mass
boiling point
33
ax Planck proposed that "hot" objects radiate energy in small, specific amounts called
hertz
waves
quanta
electrons
34
Whenever an excited hydrogen atom returns from an excited state to its ground state, it
absorbs specific frequencies of light
absorbs a photon of radiation
emits a photon of radiation
emits radiation over a range of frequencies
35
The distance between corresponding points on adjacent waves is the wave's
energy
wavelength
frequency
speed
36
The number of atoms in I mol of carbon is
5.022 x 10^23
6.022 x 10^23
6.022 x 10^22
5.022 x 10^22
37
The most massive particle in an atom is the
nuetron
proton
electron
38
When electromagnetic radiation strikes the surface of a metal, electrons are ejected from the metal's surface. This is
effects of diffraction
aufbau principle
quantum theory
photoelectric effect
39
A sample of bismuth has a mass of 343 g and a volume of 35.0 cm3 What is the density of bismuth?
o.102g/cm³
378 g/cm³
9.80 g/cm³
1.20 x 10⁴ g/cm³
40
Which process is a chemical change?
heating to boiling
slicing in two pieces
burning in air
dissolving in alcohol
41
Dalton's atomic theory helped to explain the law of conservation of mass because it stated that atoms
cannot combine
all have the same mass
are indivisible
cannot be created or destroyed
42
One way to separate the different kinds of matter in a mixture is through
decomposition
filtration
electolysis
chemical reactions
43
Which of the following is an example of a heterogeneous mixture?
water
chunky peanut butter
gold ring
tap water
44
The lowest energy state of an atom is its
electron configuration
principle quantum number
highest-occupied energy level
ground state
45
Which are the sublevels in an energy level of n x 3?
p,d, and f
s,p, and d
s,d, and f
s,p, and f
46
The total number of orbitals that can exist at a given main energy level, n, is equal to
n
n²
n-1
2n²
47
Research that is carried out for the sake of increasing knowledge, such as research into the properties of a substance
applied research
basic research
technological development
48
According to Einstein, which of the following can behave like a wave and also like a stream of particles?
electromagnetic radiation
the atomic nucleus
a hydrogen atom in the ground state
a noble gas
49
noble gases are generally
malleable
unreactive
semiconductors
brittle
50
Which of these is an example of a heterogeneous mixture?
mud
nitrogen
salt
air
51
The horizontal rows of the periodic table are called
groups
periods
columns
families
52
The least massive particle in an atom is the
nuetron
electron
proton
53
According to the law of definite proportions, any two samples of KCI will have
different densities
slightly different molecular structures but the same two elements.
the same mass
the same elements in the same proportions by mass.
54
In which orbital(s) are all the inner-shell electrons located in an atom of magnesium that is in the ground state?
1s,2s
1s, 2s, 2p
1s
1s, 2s, 2p, 3s
55
Which of these statements about density is true?
density is proportional to the amount of a substance.
Density may be used to help identify a material.
Density is expressed in units of mL/cm3.
Density does not change with temperature
56
The atomic symbol for beryllium, 9/4 Be indicates that the
atomic number is 9
atomic number is equal to 9-4
mass number is 4
atomic number is 4
57
A scientist is working to improve a product that uses fiber optics. This is an example of
applied research
both of th above
basic research
58
An atom of potassium has 19 protons and 20 neutrons. Its mass number is
39
9
20
19
59
A scientist is working in the lab, with compounds containing carbon. She is most likely working in the field of
inorganic chemistry
organic chemistry
theoretical chemistry
60
Neutral atoms contain equal numbers of
protons electrons and nuetrons
electrons and nuetrons
protons and nuetrons
protons and electrons
61
Which of these terms best describes the following statement? "A solutionofthe unknown compound turned litmus paper blue
quantitative
qualitative
hypthesis
model
62
How many possible orientations does an s orbital have?
2
5
3
1
63
which is an example of a non metal
phosphorus
cadmium
copper
mercury
64
Which of these does the angular momentum quantum number indicate?
the shape of an orbital
the orientation of an orbital around the nucleus
the energy level of an electron
the spin rate of an electron in an orbital
65
Which feature of Dalton's atornic theory is different from rnodern atomic theory?
atoms cannot be rearranged in chemical reactions
atoms cannot be subdivided
atoms cannot be destroyed
atoms combine in whole-number ratios
66
Which of these is an example of an element?
soil
water
oxygen
sugar
67
Rutherford's gold-foil experiment led him to conclude that
a dense region of positive charge existed somewhere in the atom.
alpha particles were a poor choice for a bombardment material.
light was emitted by electrons returning to ground state.
Thomson's plum pudding model of the atom was accurate.
68
most of the volume of an atom is occupied by the
nuclides
nucleus
electrons
protons
69
Compared with a mole of lead atoms, a mole of iron atoms
has the same number of atoms
has more atoms
cannot be determined
has fewer atoms
70
The measurement 0.0265 g, rounded off to two significant figures, would be
0.03 g
0.030 g
0.026 g
0.027 g
71
The ancient Greek natural philosopher who first proposed the notion of the atom was
socrates
aristotle
democritus
plato
72
Neutral atoms of the same element can differ in
number of protons and electrons
mass number
atomic number
chemical properties
73
Which of the following is an extensive property of matter?
melting point
boiling point
volume
density
74
A homogeneous mixture is one that
acts as solvent
cannot change state easily
contains only one element
is uniform in composition
75
The branch of chemistry called analytical chemistry most likely would be used in determining the
chemical compostition of a new substance
effect of a chemical compound on living things.
economic effects of a new substance.
uses of a particular metal.
76
When an atom in an excited state emits a photon of radiation, the energy of the photon is equal to the
total energy of the atom's excited state and its final state.
difference in energy between the atoms excited state and its final state.
energy of the atom's final state.
energy of the atom's excited state.
77
How many possible values are there for the spin quantum number?
2
4
5
3
78
The average atomic mass of an element is the average of the atomic masses of its
two most abundant isotopes
artificial isotopes
radioactive isotopes
naturally occuring isotopes
79
The dimensions of rectangular solid are measured to be 1.27 cm, 1.3 cm, and 2.5 cm. The volume should be recorded as
4.12 cm³
4.13 cm³
4.1 cm³
4.128 cm³
80
The average atomic mass of an element is
the same as the atomic number of the element.
the mass of one isotope of the element
the weighted average of all naturally occurring isotopes of the element.
the sum of the number of neutrons and protons in an atom.
81
Millikan's experiments led to the determination
of the approximate value of the electron's mass.
that the electron carries no charge.a.
of the electron's positive charge.
that the electroin has no mass
82
The number of significant figures in the measurement IÄ() km is
4
6
3
5
83
At sea level, water boils at 100 degrees C. This is an example of a(n)
chemical change
physical property
extensive property
chemical property
84
A photon is emitted from a gaseous atom when an electron moves to its ground state from a(n)
inner shell
less energetic state
n=0 state
excited state
85
Chemistry is a natural science that deals with the study of
the physical features of Earth.
living things and their life processes.
the composition, structure, properties, and changes of matter.
the composition, motion, and relative positions of stars and planets.
86
Which of the following types of electromagnetic radiation has the lowest frequency?
infrared light
x rays
microwaves
unltraviolet light
87
. Which of these recorded observations is qualitative, rather than quantitative?
the solid has a mass of 23.4g
Iron is denser that aluminum
a chemical reaction is complete in 2.3s
the compound melts at 87.5C
88
To find a safer chemical for industrial purposes, a scientist is working with chemicals that do not cause depletion of
applied research
basic research
technological development
89
The branch of chemistry in which the compositions of materials are identified is known as
analytical chemistry
physical chemistry
biochemistry
organic chemistry
90
Homogeneous mixtures are also called
solutions
atoms
molecules
compounds
91
To determine the mass in grams of an atom of any element, you would
multiply the mass of a mole of the element by Avogadro's number.
divide the mass of a mole of the element by Avogadro's number.
subtract the mass of a mole of the element from Avogadro's number.
add the mass of a mole of the element to Avogadro's number.
92
In general, which properties are common to elements within a single group on the periodic table?
boiling and freezing point
chemical properties and ability to bond to other atoms
color and luster
atomic number and atomic weight
93
The SI base units for time and temperature are
second and degree celcius
second and kelvin
hour and degree celcius
hour and kelvin
94
Which of the following is a pure substance?
air
stainless steel
water
granite
95
Which of the following changes is a chemical change of matter?
vinegar combining with baking soda to produce carbon dioxide
water boiling to make water vapor
liquid silica solidifying to form glass
ice melting and producing water
96
What is the difference between a mixture and a compound?
all mixtures are heterogeneous.
a. All mixtures have a uniform composition.
Mixtures can be separated by physical processes.
Mixtures are made of at least two different elements.
97
The conversion factor 1L/10³mL would be used to change
units of length to units of volume.
milliliters to liters
liters to milliliters
units of volume to units of length.
98
The molar mass of an element is numerically equal to
the element's average atomic number.
the percentage composition of the element by mass.
the number of electrons possessed by an element.
the element's average atomic mass.
99
Neon-22 contains 12 neutrons. It also contains
12 protons
10 protons
22 protons
22 electrons
100
What is the total number of electrons needed to fill the fourth main energy level?
32
8
4
16

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