which properties are common to elements within a single group on the periodic table?

chemical properties and ability to bond to other atoms

an objects weight is a measure of.....(35)

the force with which its attracted by gravity

according to the law of definite proportions, any tow samples of KCI will have...

the same elements in the same proportions by mass

The molar mass of an element is numerically equal to

the element's average atomic mass

A scientist working to improve a product using fiber optics is in __________

applied research & technoligical development

which of these statements about density is true?

density may be used to help identify an object

To determine the mass in grams of an atom of any element, you would

divide the mass of a mile of the element by Avogadro's number

which statement best describes an element?

a pure substance made of of only one type of atom

The discovery of the nucleus was result that a small percentage of the positivity charged particles bonbarded metal surf

were deflected back toward the source

whats the difference between a mixture and a compound?

mixture can be separated by a physical process

Millikan's experiments led to the determination

of the approximate value of the electron's mass

studbud

Chemistry 1 midterm 2023

100 termsStudBud Administration23 plays

Imported from external platform

Flashcards100 cardsFPractice quizPHost liveL

Questions 100

Answers

1
The smallest unit of matter
a molecule
a mixture
a compound
an atom
2
which properties are common to elements within a single group on the periodic table?
boiling point and freezing point
chemical properties and ability to bond to other atoms
atomic number and atomic weight
color and luster
3
In which of the measurements are all the zeroes considered to be nonsignificant figures?
400.
506
60.0
0.0037
4
In which orbital(s) are all the inner-shell electrons located in an atom of magnesioum that is in the ground state?
1s, 2s
1s
1s, 2s, 2p, 3s
1s, 2s, 2p
5
which of the following is an intensive property of matter?
density
energy content
volume
mass
6
an objects weight is a measure of.....(35)
a pressure exerted on a scale
the force with which its attracted by gravity
the force causing the object to move
the amount of material per unit volume
7
which is a extensive property of matter?
volume
density
melting point
boiling point
8
An element near argon on the periodic table would probably be______.
a poor heat conductor
a good electrical conductor
solid at room temp
shiny and malleable
9
Most of the volume of an atom is occupied by the
nucleus
electons
protons
nuclides
10
Thomson's experiment showed that the charge-to-mass ratio of electorns was
greater with noble gases than for other gases
dependent on the element's atomic mass
the same in all gases
less with noble gases than for other gases
11
Which of the following orbital notations for phosphorus is correct?
see paper
see paper
See paper
See paper
12
the atomic symbol for beryllium 9/4 Be indicates that the
atomic number is 4
atomic number is equal to 9 - 4
atomic number is 9
mass number is 4
13
#57
b
d
c
a
14
samples with masses 0.12, 1.8, 0.562 g are mixed together. The combined mass, with correct sigfigs should be...
2.5
2.4
2.48
2.482
15
An atom of potassium has 19 protons and 20 neutrons. Its mass number is
9
19
39
20
16
one way to separate the different kinds of matter in a mixture is through _______.
electrolysis
decomposition
filtration
chemical reactions
17
0.0930 m expressed in scientific notation is...
93 x 10^-3 m
9.30 x 10^-2 m
9.30 x 10^-4 m
9.3 x 10^-3 m
18
the unit cm^3 is used to express ________.
length
time
volume
mass
19
the measurement 0.0265 g rounded to two sigfigs would be....(38)
0.03
0.026
0.027
0.030
20
Which feature of Dalton's atomic theory is different from modern atomic theory?
Atoms cannot be destoryed
Atoms combine in whole-number ratios
Atoms cannot be subdivided
Atoms cannot be rearranged in chemical reactions
21
A proton is emitted from a gaseious atom when an electron moves to its ground state from a(n)
inner shell
n=0 state
less energetic state
excited state
22
SI unit prefixes from least to greatest
kilo,milli,centi
kilo,centi,milo
centi,milli, kilo
milli,centi.kilo
23
the number of sigfigs in the measurement 170.040 km is.... (40)
three
four
five
six
24
according to the law of definite proportions, any tow samples of KCI will have...
slightly different molecular structures but the same two elements
different densities
the same mass
the same elements in the same proportions by mass
25
The molar mass of an element is numerically equal to
the number of electrons possessed by an element
the element's average atomic mass
the percentage composition of the element by mass
the element's average atomic number
26
which of the following is an example of a heterogeneuos mixture?
gold ring
chunky penut butter
orange-colored sugar water
tap water
27
Which state of matter is composed of atoms that have lost many of their electrons?
gas
plasma
liquid
solid
28
What is the total number of electrons needed to fill the fourth main energy level?
4
8
16
32
29
Which are the sublevels in an energy level of nx3?
s,p, and d
s,d, and f
s,p, and f
p,d, and f
30
A scientist working to improve a product using fiber optics is in __________
applied research & technoligical development
applied research
basic research
technological devlopment
31
When electromagnetic radiation strikes metal, electons are ejected from the surface. This is a description of the
photoelectric effect
aufbau principle
quantum theory
effects of diffraction
32
a scientist that creates things for industrial purposes is an example of ______.
applied research
none of the above
technological development
basic research
33
The most massive particle in an atom is the
proton
neutron
electron
none of the above
34
which of these statements about density is true?
density doesnt change with temperature
density is proportional to the amount of a substance
density may be used to help identify an object
density is expressed in units of mL/cm^3
35
which is an example of a nonmetal?
mercury
copper
cadmium
phosphorus
36
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
subtract the mass of a mole of the element from Avogadro's number
divide the mass of a mile of the element by Avogadro's number
add the mass of a mile of the element to Avogadro's number
37
The units of molar mass are
g/mol
amu/mol
amu/g
mol/g
38
the branch of chemistry in which the composition of materials are identified is known as
organic chemistry
biochemistry
analytical chemistry
physical chemistry
39
which of these is an example of an element
sugar
soil
oxygen
water
40
which of the following is a pure substance?
stainless steel
granite
water
air
41
which statement best describes an element?
a substance contaioning only carbon atoms
a pure substance made of of only one type of atom
any kind of crystal
any combination of two or more atoms of different types
42
The least massive particle in an atom is the
none of the above
neutron
electron
proton
43
The discovery of the nucleus was result that a small percentage of the positivity charged particles bonbarded metal surf
passed straight through the metal
were slightly deflected as they passed through the metal
were deflected back toward the source
combined with the metal
44
The total number of orbitals that can exist at a given main energy level, n, is equal to
n-1
n^2
2n^2
n
45
whats the difference between a mixture and a compound?
all mixtures are heterogeneuos
mixture can be separated by a physical process
mixtures are made of two different elements
all mixtures are uniform in composition
46
at sea level, water boils at 100 degrees C. This is an example of...
extensive property
chemical change
physical property
chemical property
47
Dalton's atomic theory helped to explain the law of conservation of mass because it stated that atoms
are indivisible
cannot be created or destoryed
all have the same mass
Cannot combine
48
Millikan's experiments led to the determination
that the electron has no mass
of the approximate value of the electron's mass
that the electron carries no charge
of the electron's positive charge
49
The lowest energy state of an atom is its
ground state
electron configuration
principle quantum number
highest-occupied energy level
50
which of these is NOT an SI base unit? (37)
meter
pound
ampere
kelvin
51
which of theses is a heterogeneuos mixture?
nitrogen
air
mud
salt
52
According to Einstein, which of the following can behave like a wave and also like a stream of particles?
a hydrogen atom in the ground state
electromagnetic radiation
the atomic nucleus
a noble gas
53
noble gases are generally_______.
brittle
unreactive
semiconductors
malleable
54
which of these is qualitive?
2.3s
23.4 g
iron is denser than aluminum
87.5C
55
homogeneous mixture are also called______.
molecules
atoms
compounds
solutions
56
The behavior of cathode rays in a glass tube containing gas at low pressure led scientists to conclude that the rays are
negative particles
positive particles
Energy
neutral particles
57
When an atom in an excited state emits a photon of radiation, the energy of the photon is equal to the
difference in energy between the atom's excited state and its final state
energy of the atom's final state
energy of the atom's excited state
total energy of the atom's excited state and its final state
58
Compared with a mole of lead stoms, a mole of iron atoms
cannot be determined because iron is magnetic
has more atoms
has the same number of atoms
has fewer atoms
59
What is the correct electron configuration for a ground-state atom with 7 electrons?
1 s^2 2 s^2 2 p^2 3 s^1
1 s^2 2 s^3 2 p^2
1 s^2 2 s^3
1 s^2 2 s^2 2 p^3
60
The ancient Greek natural philosopher who first proposed the notion of the atom was
Plato
Socrates
Democritus
Aristotle
61
The electron configuration below represents a ground state atom of which element? 1s^2 2s^2 2p^6 3s^2 3p^4
selenium
sulfur
silicon
oxygen
62
The electon configuration below violates (1s ^v 2s ^v 2p ^v ^ ^)
the Aufbau principle
This does not violate any rule or priciple
Hund's rule
the Pauli exclusion priciple
63
A scientist using math and computer models is in the field of________
analytical chemistry
biochemistry
physical chemistry
theoretical chemistry
64
Which of these does the angular momentum quantum number indicate?
the orentation of an orbital around the nucleus
the spin stat of an electron is an orbital
the shape of an orbital
the main energy level of an electron
65
A sample of bismuth has a mass of 343 g and a volume of 35.0 cm^3. What is the density?
378
1.20 x 10^4
9.80
0.102
66
when 6.02 x 10^23 is multiplied by 9.1 x 10^-31
5.5 x 10^-8
5.5 x 10^55
5.5 x 10^-7
5.5 x 10^-53
67
which proccess is chemical change?
burning in air
slicing into two pieces
dissolving in achlohol
heating to boiling
68
the horizontal rows on the periodic table are called_____.
families
columns
groups
periods
69
the dimensions of a rectangle are 1.27, 1.3, and 2.5 cm. What is the volume?
4.128
4.12
4.1
4.13
70
according to the law of conservation of mass, when sodium, hydrogen, an doxygen react to form a compound, the mass
equal to the sum of the masses of the reactants
less than the sum of the masses of the reactants
greater than the sum of the masses of the reactants
either less than or equal to the sum of the masses of the reactants
71
A homogeneous mixture is one that_______
contains only one element
cannot change state easily
acts as a solvent
is uniform in composition
72
Which of the following types of electromagnetic radiation has the lowest frequency?
infrared light
x-rays
ultraviolet light
microwaves
73
the SI base unit for mass is the...(36)
cubic cm
meter
kilogram
gram
74
every pure chemical compound consists of two or more elements that...
can be separated by a physical change
are combined in any portion
cant be separated
are combined chemically
75
What is the highest occupied energy level in an atom of strontium in its ground state?
n=4
n=5
n=6
n=3
76
which describes this statement "a solution of the unknown compuond turned litmus paper blue"
hypothesis
model
qualitive observation
quantitive observation
77
The basic principles of atomic theory were first conceived by
Avogadro
Rutherford
Dalton
Bohr
78
neutral atoms contain equal numbers of
electrons and neutrons
protons and electrons
protons and neutrons
protons, electrons, and neutrons
79
The average atomic mass of an element is
the weighted average of all naturally occurring isotopes of the element
the same as the atomic number of the element
the sum of the number of neutrons and protons in an atom
the mass of one isotope of the element
80
A scientist working with compounds containing carbon is likely working in a field of__________
organic chemistry
theoretical chemistry
None of the above
inorganic chemistry
81
Analyitical chemistry would most likely be used in determining the __________
effect if a chemical compound on living things
uses of a particular metal
economic effects of a new substance
chemical composition of a new substance
82
What is the correct noble-gas notation for the electron configuration of an atom of chlorine?
(Ne) 3 s^2 3 p^5
(Ar) 3 s^2 3 p^4
(Ar) 3 s^2 3 p^3
(Ne) 3 s^2 3p^4
83
How many possible orientations does an s orbital have?
3
2
5
1
84
How many possible values are there for the spin quantum number?
5
2
3
4
85
An orbital that would never exist in the quantum description of an atom is
3d
8s
3f
6d
86
The diagram ^v represents two electrons with
opposite spin states
different energies
the same spin state
the same energy
87
Research thats carried out for the sake of knowledge is considered_________.
None of the above
applied research
basic research
technological development
88
which of the following is a chemical change?
ice melting to water
vinegar and baking soda producing carbon dioxide
water boiling and producing water vapor
liquid silica solidifying to form glass
89
which of these is an extensive property
boiling point
mass
density
color
90
CAFFEINE NOT TYPED #25
a
c
b
d
91
chemistry is a natural science that deals with the study of...
the composition, motion, and relative positions of stars and planets
living things and thier life process
the physical features of earth
the composition, structure, properties, and changes of matter
92
which of the following is a physical change?
paper burning
water evaporating
a silver spoon tarnishing
nail rusting
93
Rutherfords gold-foil experiment led him to conclude that
light was emitted by electrins returning to ground state
a dense region of positive charge exists somewhere in the atom
thompsons plum pudding model of the atom was accurate
alpha particles were a poor choice for bombardment material
94
The SI base for time and temp are________.
hour and kelvin
seconds and celsius
hour and celsius
seconds and kelvin
95
if some measurement agree closely with each other but differ widely from the actual value, these measurements are...
only precise
neither precise nor accurate
both accurate and precise
only accurate
96
the conversion factor 1L/10^3 mL would be used to change
L to mL
lenght to volume
mL to L
volume to length
97
whats the variable in the experiment determining whether steel rusts more quickly near a lake or desert in a year?
amount of rust
time of exposure
amount of water in the air
mass of steel
98
Neutral atoms of the same element can differ in
mass number
chemical properties
number of protons and electrons
atomic number
99
The distance between corresponding points on adjacent waves is th wave's
energy
speed
wavelength
frequency
100
In division and multiplication, the answer should have the same number of sigfigs as the....(39)
average number of sigfigs in caculation
number in the caculation with the fewest sigfigs
number in the caculation with the most sigfigs
total number of sigfigs in the caculation

Chemistry 1 midterm 2023 Flashcards | StudBud