Which of the following best describes plasma?

Mixture of ionized gas and free-floating electrons

Select all that apply to Dalton's Atomic Theory

Elements are composed of tiny, invisible particles called atoms, All atoms of a given element are identical and unique, Chemical reactions do not create or destory atoms, instead they recombine, Compounds are formed by bonding atoms together in a fixed ratio by mass

Which of the following Law's does Dalton include in his theory?

Law of Multiple Proportions, Law of Conservation of Mass, Law of Definite Proportions

Elements are electrically ________

Neutral (Equal # of protons and electrons)

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Chem Exam 3 Review 1

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1
Ionic compounds have no net charge
True
False
2
If an electron configuration with 8 valoence electrons is chemically inert (not chemically reactive)
False
True
3
Isotopes have the same number of __(a)__ but different number of __(b)__
(b) Neutrons
(b) Protons
(a) Neutrons
(a) Protons
4
Sublimation is the change of a _______ to a _______
Gas to a liquid
Solid to a gas
Liquid to a gas
Liquid to a solid
5
Which of the following best describes a gas?
Easily change volume
Resist changes to shape and volume
Mixture of ionized gas and free-floating electrons
May change volume
6
Metals are found on which side of the table?
Left
Right
Middle
7
Identify the elements
He, Ca, Mg
H2O, N2O, NaCl
N2, O2, H2
8
What is the smallest unit of matter that retains all of the chemical properties of an element?
Neutron
Proton
Electron
Atom
9
Some elements exists in nature as _______ (2 or more bonded atoms)
Elements
Compounds
Electrons
Molecules
10
A pure substance which consists of a single type of atom is known as?
Compound
Proton
Molecule
Element
11
Hydrogen bonding is stronger than dipole-dipole bonding
False
True
12
How many electrons can the 3rd shell hold (s, p, d)?
8
10
18
6
13
Which of the following orbit the nucleus of an atom?
All of the above
Neutrons
Protons
Electrons
14
H2O has dipole-dipole bonding but no hydrogen bonding
False
True
15
The spin of an electron or proton is directly measurable
False
True
16
Condensation is the change of a ______ to a _______
Liquid to a solid
Solid to a liquid
Gas to a liquid
Liquid to a gas
17
Nuclei and electrons have angular momentum knowns as _______
Speed
Curvature
Motion
Spin
18
A substance can be both a molecule and an element
True
False
19
Compounds contain a single kind of atom while molecules are composed of two or more bonded atoms
True
False
20
Which of the following best describes plasma?
Mixture of ionized gas and free-floating electrons
Resist changes to shape and volume
Easily change volume
May change volume
21
Chemistry is the study of composition, properties, and structure of matter at the atomic and molecular levels
False
True
22
An anion has a ______ charge and has _______ electron(s)
Lost
Gained
Negative
Positive
23
Select all that apply to Dalton's Atomic Theory
Elements are composed of tiny, invisible particles called atoms
All atoms of a given element are identical and unique
Chemical reactions do not create or destory atoms, instead they recombine
Compounds are formed by bonding atoms together in a fixed ratio by mass
24
The atomic mass number is equal to the number of _______ in an atom?
Electrons
Protons and Electrons
Protons
Protons and Neutrons
25
Physics is a field of study that describes the motion, mechanics, force, and energy of matter
True
False
26
Which of the following Law's does Dalton include in his theory?
Columb's Law
Law of Multiple Proportions
Law of Conservation of Mass
Law of Definite Proportions
27
Nonpolar covalent bonds share electrons equally while polar covalent bonds share electrons unequally
False
True
28
A cation has a negative charge while an anion has a positive charge
True
False
29
Intensive physical properties are integral to the material regardless of sample size where extensive depends on size
True
False
30
Elements are electrically ________
Neutral (Equal # of protons and neutrons)
Negative
Neutral (Equal # of protons and electrons)
Positive
31
Ions are atoms that have gained or lost electrons from their natural composition
True
False
32
The nucelus of an atom contains which of the following?
Protons, Neutrons and Electrons
Neutrons and Electrons
Protons and Neutrons
Protons and Electrons
33
Identify the molecules
N2, O2, H2
He, Ca, Mg
H2O, N2O, NaCl
34
The ____ group on the periodic table tell us the # of valence electrons in the outer shell
D
C
B
A
35
When halogenated, flammability is eliminated but toxicity increases
False
True
36
Electront shells are divided into subshells with the designations s, p, d, f and g. How many electrons can they hold?
2, 8, 12, 16, 20
2, 6, 12, 16, 18
2, 4, 6, 8, 10
2, 6, 10, 14, 18
37
Which group of elements are colorless, orderless, and reluctant to combine with other elements to form compounds
Alkali Metals
Alkali Earth Metals
Noble Gasses (Group 18, 8A)
Halogens (Group 17, 7A)
38
Which area of the periodic table satisfies the octet rule?
Halogens
Nobel metals
Alkali metals
Nobel gasses
39
The number of _______ in an atom constitutes its atomic number and uniquely identifies the atom as a chemical element
Electrons
Atoms
Neutrons
Protons
40
Which side of the periodic table is more electronegative
Middle
Left
Right
41
Which of the following intermolecular bonding is the second strongest?
Hydorgen
Covalent
Electrostatic
London Force
42
Which of the following describes an atom or group of atoms bonded together that have a net electrical charge?
Molecule
Ion
Compound
Element
43
Common elements of living organisms include?
O, CO2, H2O
K, Na, Ca
O, CO2
O, C, H, N
44
Metals _______ 1-2 electrons to achieve a noble gas-like electron configuration to form a(n) ________
give up
anion
cation
gain
45
How many electrons can the 2nd shell hold (s, p)?
8
2
6
10
46
Each electron shell is also labeled with the following letters
W, X, Y, Z
P, Q, R, S
K, L, M, N
A, B, C, D,
47
H2O is an example of a dipole. If forming an ion-dipole bond, where would Na+ attach?
To the oxygen
None of the above
To the hydrogen
48
Non-metals _______ 1-2 electrons to achieve a noble gas-like electron configuration to form a(n) ________
anion
gain
cation
give up
49
Atomic mass # - atomic # =
Protons
Atoms
Neutrons
Electrons
50
How many orbitals does the p subshell have?
1
3
5
10
51
Vaporization is the change of a ________ to a _______
Gas to a liquid
Liquid to a gas
Liquid to a solid
Solid to a liquid
52
Atomic mass # =
Protons + Electrons
Protons - Electrons
Protons + Neutrons
Protons - Neutrons
53
Intermolecular forces are determines by chemical bonding
False
True
54
Which of the following best describes a liquid?
Mixture of ionized gas and free-floating electrons
Resist changes to shape and volume
May change volume
Easily change volume
55
Deposition is the change of a _______ to a _______
Gas to a liquid
Solid to a gas
Gas to a solid
Liquid to a gas
56
Covalent bonds are typically between ________ and ________
Metals & Nonmetals
None of the above
Nonmetals & Nonmetals
Metals & Metals
57
Compounds that are comprised of cations and anions bonded together resulting in no net charge
HCO3-, OH-
Ionic compounds
NaCl, LiCl
Polyatomic ions
58
Select the anions below
Cl-
I-
Ca2+
K+
59
Which of the following is NOT a form of electrostatic bonding?
Ion-Ion
Covalent
Ion-Dipole
Dipole-Dipole
60
Select the cations below
H+
Ca2+
Cl-
K+
61
________ bonds are formed when electrons are transfered and the ions are held together by charge differences
Covalent
Ionic
62
All molecules are NOT compounds, but all compounds are molecules
True
False
63
Electrons do NOT need to fill lower shells prior to filling the higher energy level/outer shells
False
True
64
Which of the following best describes a solid?
May change volume
Resist changes to shape and volume
Easily change volume
Mixture of ionized gas and free-floating electrons
65
Identify the compounds
H2O, N2O, NaCl
N2, O2, H2
He, Ca, Mg
66
A dipole molecule has an area that is positively charged and an area that is negatively charged
True
False
67
Which of the following includes all states of matter?
Liquids and gasses
Solids, liquids, gasses and plasma
Solids and liquids
Solids, liquids, and gasses
68
The spin of an electron and proton causes an uneven distribution of charge that can be measured
False
True
69
Which of the following are considered chemical properties?
Toxicity
Volume
Oxidation
Radioactivity
70
Mass # can be smaller than atomic number
True
False
71
Valence electrons are found on the _______ shell with the ______ energy
Outermost
Highest
Lowest
Innermost
72
Gasses are fluids
False
True
73
Non-metals are found on which side of the table?
Right
Middle
Left
74
Which of the following are considered physical properties?
Melting/boiling point
Flammability
Color
Density, volume, mass
75
Hydrogen bonding is possible when a hydrogen atom is directly bonded to which of the following?
O
F
N
C
76
When preoxygenating your patient you are trying to denitrogenate their lungs
True
False
77
How many orbitals does the d subshell have?
3
5
1
10
78
What is atmospheric oxygen/nitrogen %?
O2 - 21%, N2 - 78%
O2 - 50%, N2 - 50%
O2 - 20%, N2 - 80%
O2 - 78%, N2 - 21%
79
Compounds are composed more than one kind of atom in a fixed ratio by mass
True
False
80
There is NO transfer of electrons in covalent bonds
False
True
81
Ionic bonds are typically between ________ and ________
Nonmetals & Nonmetals
Metals & Nonmetals
Metals & Metals
None of the above
82
In order to form a compound, atoms of differing elements are combined by?
Chemical reactions
Covalent bonds
Electrons
Atomic numbers
83
The period number of an element corresponds to the number of ___________ for that element
Neutrons
Electron shells
Protons
Electrons
84
What is the strongest electrostatic bond?
Covalent
Ion-Dipole
Ion-Ion
Dipole-Dipole
85
Vertical columns are called groups while horizontal rows are called periods
True
False
86
_________ bonding involves the sharing of electrons between two or more atoms
Covalent
Ionic
87
Polyatomic ions have no net charge
False
True
88
Molecules with ionic bonds have low melting and boiling points
True
False
89
________ are what enable anesthetic gasses to be transferred from flammable to non-flammable
Atoms
Oxidation reactions
Extensive sample sizes
Halogens
90
The further away you are from the nucleus, the higher the energy level
False
True
91
How many orbitals does the s subshell have?
10
6
2
1
92
An Ion-Ion bond is _________ and results from the attraction between ________ charged ions
Oppositely
Non-directional
Unidirectional
Similarly
93
A cation has a ______ charge and has _______ electron(s)
Gained
Negative
Positive
Lost
94
A group of two or more atoms covalently bonded together that behave as a single unit and have a net charge. Examples?
Ionic compound
NaCl, LiCl
HCO3-, OH-
Polyatomic ions
95
How many electrons can the 1st shell hold (s)?
8
6
1
2
96
Although isotopes are the same element, the different numbers of neutrons effects what?
Electrons
Elements
Protons
Mass number
97
The dipolar nature of H2O molecules enables formation of ______ bonds with one another
No
Strong
Weak
Unbreakable
98
The automic number is the number of neutrons within the nucleus
True
False
99
The number of valence electrons drives a chemical bond between atoms
True
False
100
Which of the following correctly identifies the charges of protons, neutrons and electrons?
Protons - negative, Neutrons - lack a charge, Electrons - positive
Protons - negative, Neutrons - positive, Electrons - lack a charge
Protons - postivie, Neutrons - negative, Electrons - lack a charge
Protons - positive, Neutrons - lack a charge, Electrons - negative

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