The word hydrate at the end of a name with greek prefixes (ex heptahydrate) is referring to ______.

the number of water molecules present

Why do you need to know this stuff?

Because its cool, To be a quantum physicist, Mrs. Hambrick is making me, Ohio said so

Which one of the following statements about theories is incorrect?

They should be accepted as established truth

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Chemistry Final 2025 Prep

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Questions 103

Answers

1
The magnetic spin (ms) number could be which of the following numbers?
7
1/2
1
two of the above
2
Which elements ALWAYS have a +2 charge?
halogens
transition metals
alkaline earth metals
alkali metals
3
Mg2+ is a _________.
Positron
Cation
Anion
Isotope
4
What type of formula best represents the bonds and shape of a molecule?
structural
empirical
mathematical
molecular
5
The _________ uncertainty principle states that you cannot know the energy and position of a _______ at the same time.
Heisenbergy, proton
Broglie, electron
Broglie, proton
Heisenberg, electron
6
The azimuthal number is based onf the probability charts, which tells the electron orbitals' ______
energy
distance from the nucleus
shape
electron spin
7
The __________ mass tells how many grams of a substance are in one mole of that same substance.
actual
empirical
theoretical
molar
8
What is not true regarding models?
They are essential to chemistry
They are exact and accurate
They have predictive power
They are workable
9
Which of the below would have 8 dots around them in their Lewis structure?
Helium
Arsenic
Two of the above
Radon
10
How many significant digits are in 0.0560 g?
2
5
4
3
11
Who used spectroscopy to determine the energy level of electrons in different atoms?
Bohr
Dalton
Thomson
Rutherford
12
Which part of the atom determines what type of element an atom is?
Electron cloud
Neutron
Electron
Protons
13
The invention of the _________ by Volta opened the door to many new experiments and led to more discoveries about atoms
gas discharge tube
nuclear reactor
battery
none of the above
14
Which of the below has the highest energy?
5s
5p
4f
4d
15
A fraction equal to 1 that contains both the original unit and its equivalent value in a new unit is called a(n)?
derived unit
Conversion factor
exponential factor
pure number
16
190/78 Pt - How many neutrons are in the element?
190
112
78
268
17
What is the oxidation number of Mg2+
+2
-2
+1
0
18
190/78 Pt - The number 78 is the __________.
Atomic Number
two of the above
Mass number
Number of protons
19
The electron-sea theory accounts for all of the following characteristics of metals except...
luster
malleability
conductivity
brittleness
20
________ made his atomic model after experimenting with gas discharge tubes. He found a negatively charged particle...
Thomson
Rutherford
Chadwick
Dalton
21
The word hydrate at the end of a name with greek prefixes (ex heptahydrate) is referring to ______.
the number of water molecules present
the number of H atoms present
It is made up
how much water is needed to keep you healthy
22
Why do you need to know this stuff?
Because its cool
To be a quantum physicist
Mrs. Hambrick is making me
Ohio said so
23
What part of the atom effects the stability of the nucleus?
Quantums
Neutrons
Protons
Electrons
24
Which one of the below is NOT an example of matter?
Two of the above
Table
Air
Thoughts
25
Which part of the atom is found outside the nucleus in a "cloud"?
neutron
proton
electron
both n + p
26
A(n) _________ system of measurement is any system of measurement based on a decimal scale.
accurate
digital
metric
basic
27
_____________ electrons are the outermost electrons and help determine how atoms bond.
Shared
Valence
Ionic
Isotope
28
Which type of bonds are named with Greek prefixes?
lewis
metallic
ionic
covalent
29
The law of ___________ states that matter cannot be created or destroyed
stability of matter
no matter go
conservation of matter
preservation of matter
30
Atoms with a different number of neutrons are known as ___________.
Elements
Nuclei
Isotopes
Ions
31
____________ is a measure of "correctness"
accuracy
significant digits
precision
moles
32
When no single Lewis structure can display the distribution of electrons, the display of an intermediate character is ..
hybridization
resonance
antibonding
polarity
33
In a chemical reaction the compounds on the left side of the equation (before the arrow) are the __________.
products
reactants
resultants
variables
34
How many molecules are in 5.00 grams of CaC2?
0.0780
7.80 x 10^22
4.70 X10^22
4.70
35
The principle energy level measures the ___________ of the electrons.
Electron spin
Distance from the nucleus
Two of the above
Energy level
36
How many electrons are in the atom O2-?
10
8
6
cannot tell with this information
37
When you see a chemical listed above the reaction arrow, it tells you that the chemical is a ____ and ____ the reaction
reactant, speeds up
reactant, slows down
catalyst, slows down
catalyst, speeds up
38
What is the molar mass of urea (NH2CONH2)
60.057 g/mol
44.034 g/mol
123.45 g/mol
17.031 g/mol
39
Fluorine is one of the special oxidation numbers and if bonded to another element ALWAYS has a number of _________.
+2
-1
-2
+1
40
Which sublevel looks like a crazy 4 leaf clover in all directions?
p
s
f
d
41
Which part of the atom is negatively charged?
proton
neutron
electron
both n + e
42
Which princple says that the ratio elements in a compound is constant for every particle in that compound?
second law of thermodynamics
law of conservation of matter
law of definite composition
law of multiple proportions
43
Who came up with the law of octaves?
Dobereiner
Dalton
Lavoisier
Newlands
44
The process by which new kinds of orbitals with equal energies are formed from a combo of orbitals is know as orbital ..
hybridization
resonance
polarity
two of the above
45
_____________ measure how close together measurements are to each other.
precision
accuracy
equations
percent error
46
190/78 Pt - How many electrons are in the element?
78
112
190
268
47
What type of bond forms as a result of orbitals overlapping end to end?
pi
gamma
sigma
delta
48
Which of the following does NOT exist as a diatomic molecule?
krypton
nitrogen
hydrogen
chlorine
49
What type of bond would you expect in a compound of bromine and sodium?
metallic
covalent
ionic
polar covalent
50
Which one of the following statements about theories is incorrect?
They help explain a body of data
They should be accepted as established truth
They can tie together various areas of science
They can be thought of as scientific models
51
Which elements ALWAYS have a +1 charge?
halogens
Alkali metals
transition metals
alkaline earth metals
52
_________ states that all orbitals recieve one electrons with the same spin before they begin to pair up.
Aufbau Princple
Lewis Principle
Pauli Exclusion Principle
Hund's Rule
53
Which of the differences in electronegativity would most likely represent a bond that is the most ionic?
2.0
1.7
0.8
3.4
54
Which of the following is the correct value for Avogadro's number?
6.032 x 10 ^22
6.23 x 10^22
6.022 x 10^23
6.22 x10^23
55
How many sigma and pi bonds are there in a molecule of O2?
1 sigma, 2 pi
1 sigma, 1 pi
no sigma, 1 pi
1 sigma, no pi
56
Hydrogen has a _____ charge when bonded with nonmetals and a _____ charge when bonded with metals.
+2, -1
+1, -1
-2, +2
-1, +1
57
190/78 Pt - How many protons are in the element?
78
190
112
268
58
An atom becomes more stable by bonding with another atom if the resulting electron configuration is more like what?
halogens
alkali metals
noble gases
metalloids
59
Who said that the elements could be arranged in triads?
Newlands
Lavoisier
Dalton
Dobereiner
60
What is found in the nucleus?
both p + e
both n + p
protons
neutrons
61
Which types of elemets typically have positive oxidation numbers?
metals
metalloids
noble gases
nonmetals
62
Who coined the term element?
Newlands
Lavoisier
Dalton
Dobereiner
63
Which of the following molecules has a bent shape?
OF2
Cl2CO
CO2
NH3
64
The ___________ states that no two electrons can have the same 4 quantum numbers.
Hund's Rule
Lewis Principle
Pauli Exlusion Principle
Aufbau Principle
65
A(n) _________ formula tells what elements are present and gives the simplest whole -number ratio of atoms
mathematical
structural
molecular
empirical
66
____ are postively charged
proton
neutron
positron
electron
67
The scale of a measuring instrument is ___________, that is accurately subdivided into measurement units.
enumerated
standardized
unitized
graduated
68
___________ bonding occurs when atoms share electrons
covalent
metallic
ionic
lewis
69
Find the percent composition of NaCl.
55% Na, 45% Cl
61% Na, 39% Cl
39% Na, 61% Cl
45% Na, 55% Cl
70
How many atoms are in 3.00 grams of copper?
2.84 x 10^22
1.81 x 10^24
1.81 x 10^22
2.84 x 10^24
71
What property did Mendeleev use to organize his table?
none of the above
atomic radius
atomic number
atomic mass
72
The compounds on the right side of the chemical equation (after the arrow) and known as the ________.
Resultants
Reactants
Products
Variables
73
How many sigma and pi bonds are there in a molecule of N2?
2 sigma, 1 pi
1 sigma, 1 pi
1 sigma, no pi
1 sigma, 2 pi
74
190/78 Pt - The number 190 is the _______.
Number of neutrons
two of the above
Mass number
Atomic number
75
Who believed matter was continuous and could be broken down forever?
Susie
Dalton
Aristotle
Democritus
76
What does the triangle mean if it is above the reaction arrow?
none of the above
place in a flask
light
heated
77
In covalent binary bonding the Greek prefixes are used for the first element EXCEPT for which prefix?
tri
tetra
mono
di
78
A compound contains 80.00% C and 20.00% H, what is the empirical formula of the compound?
C3H
C8H2
C4H
CH3
79
The (l) in chemical equations stands for what?
light
licorice
liquid
lipstick
80
What is the oxidation number of Br2?
-2
+1
-1
0
81
An orderly arrangement of ions in a 3D pattern within a compound is called a(n)
ion array
crystal lattice
crystal unit
ionic network
82
In equations the (aq) stands for what?
acquittal
aquatic
aqueous
acute
83
Which orbital looks like a dumbbell on all three axes?
p
s
d
f
84
Oxygen typically has an oxidation number of what?
-1
+1
-2
+2
85
An s orbital is shaped like a ______.
four lead clover in all directions
sphere
dumbell with 3 axes
crazed flower in all directions.
86
Which of the following shapes is always polar if the central atom is different from the outside atoms?
trigonal planar
linear
bent
tetrahedral
87
The outermost electrons are known as _________ electrons.
neutral
energetic
lonely
valence
88
A cation has a/the _________ atomic radius than/as its parent element.
larger
smaller
same
hmmm
89
Which country came up with the SI units?
France
United States
China
Britain
90
Which type of elements have properties of both metals and nonmetals?
metalloids
none of the above
two of the above
transition metals
91
Which of the following is NOT a normal property of ionic compounds?
good electrical conductivity as a solid
high melting point
none of the above
crystals that easily split
92
Which type of sublevel can contain 10 electrons?
f
p
d
s
93
What indicated the precision of a measurement and helps scientists report measurements honestly?
scientific notation
significant digits
unit of measurement
unit analysis
94
Who state that whether an object acts like a particle or a wave depends on how it is observed?
Heisenberg
Chadwick
Broglie
Bohr
95
The (s) in chemical equations means that the compound is _________.
squishy
a squid
a solid
soft
96
In which periodic trend are the noble gases excluded?
ionization energy
electronegativity
electron affinity
atomic radius
97
Which elements discovery proved that Mendeleev's table was not crazy but brilliant?
Gallium
Arsenic
Aluminum
Mercury
98
How many orbitals does a d sublevel contain?
3
10
5
6
99
Which person discovered the neutron by observing neutral particles radiating from a sample hit with alpha particles?
Rutherford
None of the above
Thomson
Bohr
100
The ______ states that electrons are added to the lowest energy orbital first.
Pauli exclusion princple
Aufbau Principle
Lewis Princple
Hund's Rule
101
Who arranged the periodic table by atomic number?
Newlands
Rutherford
none of the above
Mendeleev
102
Neutrons are _____ charged.
whoops
neutrally
negatively
positively
103
Which of the following compounds is polar?
NH3
CH4
CO2
Br2

Chemistry Final 2025 Prep Flashcards | StudBud