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KP Chemistry Midterm Review
KP Chemistry Midterm Review
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1
If electrons in an atom have the lowest possible energies, the atom is in the
reactive state
ground state
radioactive state
excited state
2
How many orbitals are in the f sublevel?
6
10
7
14
3
A volume of 1 milliliter is equivalent to
1 cubic centimeter
0.1 cubic decimeters
1 liter
1 gram
4
A chemical property of matter is
flammability
odor
density
boiling point
5
How many atoms of Au are in 196.97 g?
1.204 x 1023 atoms
4.306 x 1023 atoms
6.022 x 1023 atoms
2.308 x 1023 atoms
6
The product of 13.0 cm and 5.70 cm is correctly reported as
74.0 cm2
75 cm2
74.1 cm2
74 cm2
7
Sulfur-34 (atomic number 16) has
50 protons
34 protons
18 protons
16 protons
8
What is the energy needed to remove an electron?
electronegativity
radiant energy
electron affinity
ionization energy
9
Cu-65 (atomic number 29) has
36 neutrons
65 neutrons
94 neutrons
29 neutrons
10
A measurement that closely agrees with an accepted value is
accurate
precise
reproducible
significant
11
An atom of aluminum contains 13 protons, 13 electrons, and 14 neutrons. Its atomic number is
27
40
13
14
12
The mass of 3 moles of oxygen atoms (16 g/mol) is
48 g
64 g
32 g
16 g
13
Which concept in Dalton's theory has been changed?
all atoms of the same element have the same mass
matter is made of atoms
atoms of different elements have different masses
atoms are rearranged in chemical reactions
14
The SI base unit for amount of a substance is the
formula unit
mole
gram
particle
15
Which of the following is a homogeneous mixture?
water
chlorine gas
chicken noodle soup
apple juice
16
Magnesium, calcium, and strontium are
alkaline earth metals
lanthanides
halogens
actinides
17
Which scientist developed the uncertainty principle?
Newton
deBroglie
Heisenberg
Einstein
18
A horizontal row in the periodic table is called a(n)
octet
period
family
group
19
Rutherford discovered
the nucleus
the electron
the cathode ray
the quantum model
20
Which of the following is a chemical change?
a leaf changing color
condensation forming on your windshield
sugar dissolving in coffee
a pot of water boiling on the stove
21
Matter includes all of the following except
ice
sunlight
air
smoke
22
A student produces 5.0 g NaCl in the lab but should have produced 7.60. What is the % yield?
150 %
65.8 %
152 %
66 %
23
Which of Dalton's postulates supports the law of conservation of mass?
atoms cannot be divided
atoms cannot be destroyed in reactions
different elements have different properties
matter is made of atoms
24
The part of the atom where electrons can't go is the
energy levels
nucleus
area outside the nucleus
electron cloud
25
A packet of electromagnetic radiation is a(n)
excited atom
photon
orbital
electron
26
How many orbitals are in a d sublevel?
5
10
6
3
27
If an atom of sodium has 11 protons and 12 neutrons, what is its mass number?
23
11
1
12
28
The study of matter and the changes it undergoes best describes
biology
chemistry
physics
microbiology
29
In the Bohr model, electrons circle the nucleus
in specific, allowed orbits
as waves in orbitals
slowly
counterclockwise
30
Where can an electron most likely be found?
the electron cloud
the nucleus
the quantum
the electron configuration
31
Rutherford's conclusion about the atom was that
atoms are mostly empty space
electrons are in the nucleus
atoms cannot be divided
there are no charged particles in atoms
32
Isotopes of the same element have different
masses
numbers of electrons
atomic numbers
properties
33
The periodic law states that the properties of elements are functions of their atomic
numbers
structures
masses
radii
34
When 64.40 is divided by 200, the correct number of significant figures in the result is
5
1
4
3
35
Who based his periodic table on number of protons?
Mendeleev
Mosely
Dobereiner
Newlands
36
The sum of the protons and neutrons in an atom is
the quantum number
the atomic number
Avogadro's number
the mass number
37
To which group do lithium and potassium belong?
noble gases
halogens
transition metals
alkali metals
38
Which particle has a positive charge?
isotope
neutron
proton
electron
39
Which of the following does NOT describe the quantum atomic model?
Heisenberg contributed to it
electrons are both waves and particles
electons' exact locations can be found
orbitals tell us the most likely location of electrons
40
The number of significant figures in the measurement 2010.0 cm is
5
4
2
3
41
Mendeleev organized the elements based on
element properties
atomic number
symbols
electron configurations
42
How many moles are in 50.15 grams of fluorine? (19.00 g/mol)
952.9 mol
2.639 mol
2.6 mol
0.3789 mol
43
A physical property may be investigated by
letting rust form
setting paper on fire
allowing a peach to spoil
boiling water
44
Chemical properties
include length and volume
can be observed by looking at an object
can be observed by reacting two substances
can be observed by melting a solid
45
Energy contained in chemical bonds is
potential energy
radiant energy
thermal energy
kinetic energy
46
When atoms go from the excited state to the ground state,
energy is absorbed
energy is released
alpha particles are emitted
electrons move from a lower to a higher energy level
47
Which of the following is an intensive physical property?
density
mass
volume
length
48
How many sublevels are in the third energy level?
2
3
4
1
49
How many valence electrons do all atoms want?
2
16
4
8
50
Elements that touch the staircase are
nonmetals
metals
metalloids
gases
51
Which of the following is a physical change?
a watch turning your wrist green
a fork tarnishing
an apple going bad
ice melting
52
Which of the following is an extensive physical property?
color
melting point
luster
volume
53
Elements in the same group have similar
masses
number of energy levels
properties
atomic numbers
54
Elements on the left side of the table are
metals
metalloids
nonmetals
gases
55
Which of the following observations is quantitative?
the liquid is clear
the liquid has a pungent odor
the liquid tastes sour
the liquid freezes at -10 degrees C
56
The elements with atomic numbers from 90-103 are the
lanthanides
actinides
alkali metals
halogens
57
What is 1.245633501 x 10
8
rounded to five significant figures?
0.12456
1.2456 x 104
1.2456 x 108
12456
58
Which of these measurements has been expressed to four significant figures?
2020 g
0.052 g
3.065 g
5000 g
59
Which of the following is held together by chemical bonds?
sugar dissolved in tea
dust particles in the air
the oil and vinegar in salad dressing
the elements in water
60
Why does atomic radius increase going down a group?
the number of protons increases
the number of neutrons increases
the number of energy levels increases
effective nuclear charge increases
61
Gallium is in period
5
4
3
13
62
0.25 kg is equivalent to
250 g
250 mg
0.025 mg
0.025 g
63
Thomson's experiments
showed that the electron has no charge
showed that electrons have no mass
showed that electrons are positively charged
showed that electrons are negatively charged
64
Chlorine-35 (atomic number 17) has
17 protons, 17 electrons, 18 neutrons
18 protons, 18 electrons, 17 neutrons
35 protons, 35 electrons, 17 neutrons
17 protons, 17 electrons, 52 neutrons
65
Which of the following is a compound?
sea water
water
salad dressing
oxygen
66
Which of the following observations is qualitative?
the solid has a mass of 46 g
the pH of the liquid is 9
the liquid has a volume of 23 mL
the solid is a blue crystal
67
Which of the following is a pure substance?
olive oil
a sugar cookie
table salt
black coffee
68
Atoms of the same element can have different
atomic numbers
properties
mass numbers
numbers of protons
69
What did cathode rays help discover?
the nucleus
neutrons
electrons
protons
70
How many electrons can fit in the fourth energy level?
18
2
32
8
71
Chemistry is the study of all of the following except
changes in energy as a result of changes in matter
matter
projectile motion
changes in matter
72
If 1 inch equals 2.54 cm, how many centimeters are in 2 yards?
91.4 cm
182.8 cm
30.5 cm
14.2 cm
73
Filtration could be used to separate a(n)
element
compound
mixture
pure substance
74
Which atomic model treats electrons as waves?
Bohr's model
the quantum model
Rutherford's model
Dalton's model
75
How many orbitals are in the second energy level?
8
4
2
3
76
To which group does chlorine belong?
alkali metals
halogens
noble gases
alkaline earth metals
77
Within a group, as atomic number increases, atomic radius
goes up, then down
remains constant
decreases
increases
78
How many electrons can fit in an s sublevel?
3
2
6
1
79
Within a row on the periodic table, as atomic number increases, atomic radius
stays the same
increases
goes up, then down
decreases
80
The number of significant figures in the measurement 0.00067 is
6
5
3
2
81
Which law states that the amount of matter in the universe is constant?
the law of conservation of energy
the law of definite proportions
the law of conservation of mass-energy
the law of conservation of mass
