To draw a Lewis structure, one must know the

number of valence electrons in each atom.

Matter is anything that has mass and takes up space

Same # of protons and electrons, diffrent # of neutrons

A polar molecule contains

a region of partial positive charge and a region of partial negative charge

An atom is electrically neutral because the

number of protons equals the number of electrons

What is Electronegativity?

An atom's ability to attract an electron

describes mathematically the wave prop of electrons & other small particles

Magnetic quantum number

symbolized by m, the orientation of an orbital around the nucleus

The angular momentum quantum number

Indicates the shape of the orbital and the number of shapes possible.

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Chemistry Midterm Review

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Chem 2021

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Questions 78

Answers

1
To draw a Lewis structure, one must know the
ionization energy of each atom.
atomic mass of each atom.
number of valence electrons in each atom.
bond length of each atom.
2
According to the octet rule, this atom wants to...
Gain 1 e-
Gain 2 e-
Lose 2 e-
Lose 1 e-
3
How many significant figures are in the following number: 3500
3
1
4
2
4
The statement that no two electrons in the same atoms can have the same four quantum numbers is:
the Aufbau Principle
the Pauli Exclusion Principle
Bohr's Law
Hund's Rule
5
Which of the following is a quantitative observation?
The liquid is cloudy
The lwater is hot.
Today is a lovely day.
Water freezes at 0 degrees C
6
These are horizontal rows on the Periodic Table?
Groups
Periods
Families
7
What is matter?
Matter is a word?
I dont know
Matter is anything that has mass and takes up space
Matter is a something that will destroy things
8
According to the octet rule, this atom wants to...
Lose 2 e-
Gain 2 e-
Gain 1 e-
Lose 1 e-
9
The total number of protons and neutrons in a nucleus
atomic number
madd what
mass number
idk
10
A cation has what type of charge?
None of these
Positive
Neutral
Negative
11
Isotopes are...
Neutrons, protons and electrons have the same #
Same atomic #
Same # of protons and neutrons, diffrent # of electrons
Same # of protons and electrons, diffrent # of neutrons
12
How many valence electrons does Helium (He) have?
4
1
2
3
13
A polar molecule contains
ions
a region of partial positive charge and a region of partial negative charge
no bonds
only London forces
14
A negatively charged partical
Proton
Electron
Nucleus
Nuetron
15
What charge does a anion have?
Positive
Negative
16
What group of elements satisfies the octet rule without forming compounds?
halogens
alkaline-earth metals
noble gases
alkali metals
17
The quantum number that indicates the orientation of an orbital around the nucleus
magnetic quantum number
principle quantum number
angular momentum quantum number
spin quantum number
18
What Is A Polar Bond
Electrons are shared equally
Electrons are shared unequally
A Bear
Cold Electrons
19
If electrons in an atom have the lowest possible energies, the electrons are in their
radiation emitted states
inert states
excited states
ground states
20
Is this a physical or chemical change?
Chemical
Physical
21
Mercury is an element. Which of the following would be the same for all atoms of mercury?
the total number of protons and neutrons
the number of electrons
the number of neutrons
the number of protons
22
According to the Octet Rule, an atom will try to obtain up to how many electrons to become stable?
2
8
6
4
23
What bond type does a large electronegativity difference (>2.0) lead to?
covalent bond
polar covalent bond
ionic bond
unfriendly bond
24
An atom is electrically neutral because the
number of protons equals the number of electrons
number of protons equals the number of neutrons
ratio of neutrons to the number of electrons is 1:1
ratio of neutrons to the number of protons is 2:1
25
What is the electron configuration for Lithium?
1s1
1s2
1s22s1
1s22s2
26
The group 1 elements are called?
Midichlorians
Halogens
Alkali metals
Ions
27
The number of significant digits in the value 0.0307510 is...
6
7
5
4
28
What is the number of Significant Figures in the number: 2300000
0
2
7
5
29
Is this a physical or chemical change?
Physical
Chemical
30
What is Electronegativity?
An atom's ability to attract an electron
An atom's ability to release electrons
Magnets with negative charges sticking to each other
Taylor Swift being drawn to boys
31
What is the number of Significant Figures in the number: 0.006703
7
3
4
5
32
Which of the following is an intensive property of matter
Energy content
Mass
Volume
Density
33
Octet Rule
All of the above
Can apply to both covalent and ionic bonds.
If followed an atom would achieve a full octet/become stable
Sharing or transferring valance electrons to gain full octet
34
Quantum Theory
the atom is very small
no such thing as life
none of the above
describes mathematically the wave prop of electrons & other small particles
35
Qualitative data is:
non-integer data
whole number observations
non-numerical observations
numerical observations
36
How many electrons does nitrogen need to gain to have a full outer shell?
5
3
7
2
37
How many valence electrons does Chlorine have?
6
7
8
3
38
Quantitative can ALWAYS be _____________
an experiment
A factor that does not change throughout an experiment.
your senses
measured
39
The main energy levels of an atom are indicated by the
principal quantum numbers.
magnetic quantum numbers.
orbital quantum numbers.
spin quantum numbers.
40
What bond type does a moderate electronegativity difference (0.5 - 2.0) lead to
non-polar covalent bond
ionic bond
polar covalent bond
friendly bond
41
Magnetic quantum number
magnets stick together
observing the electron
symbolized by m, the orientation of an orbital around the nucleus
atoms are magnetic
42
A covalent bond is formed by the
losing electrons
sharing of electrons
transfer of electrons
gaining of electrons
43
The electron configuration for carbon is
1s22s22p2
1s22p4
1s22s12p3
1s22s4
44
Hydrogen is placed separately from other elements in the periodic table because it
is a gas.
has atomic nunber one.
does not exist as a free element in nature.
has many unique properties.
45
Argon, krypton, and xenon are
alkaline earth metals.
noble gases.
actinides.
lanthanides.
46
The angular momentum quantum number
Indicates the main energy level occupied by the electron.
Indicates the two fundamental spin states of an electron in an orbital.
Indicates the orientation of an orbital around the nucleus.
Indicates the shape of the orbital and the number of shapes possible.
47
What would the electron configuration for argon (Ar) be?
1s22s22p63s23p6
1s22s22p63s23p61423d2
1s22s22p63s23p1
1s22s22p63s2
48
What are the radioactive elements with atomic numbers from 90 to 103 called?
the noble gases.
the actinides
the lanthanides.
the rare-earth elements.
49
Is this a physical or chemical change?
Chemical
Physical
50
The statement that an electron occupies the lowest available energy level is...
Bohr's Law
Pauli Exclusion Principle
Aufbau Principle
Hund's Rule
51
The electrons involved in the formation of a chemical bond are called
dipoles
s electrons
valence electrons
Lewis electrons
52
Substance made of two or more different of atoms/elements
Molecule
Compound
Atom
Element
53
A quantum of electomagnetic energy is called a(n)
electron
photon
excited atom
orbital
54
Orbitals of equal energy are each occupied by one electron before any is occupied by a second
Hund's Rule
Electron configuration theory
The Afbau Principle
Pauli exclusion principle
55
Write the noble gas shorthand for Aluminum.
[Ar]3s23p1
[Ar]3s23p3
[Ne]3s23p1
[Ne]3s23p4
56
How many valence electrons are in an atom of magnesium?
2
6
3
4
57
What is the smallest unit of matter?
atom
molecule
element
crumb
58
The region outside the nucleus where an electron can most probably be found is the
quantum
electron cloud
electron configuration
s sublevel
59
How many electrons must be shown in the Lewis structure of the hydroxide ion, OH^-?
1
10
8
9
60
The emission of electrons from metals that have absorbed photons is called the
quantum effect.
dual effect.
photoelectric effect.
interference effect.
61
noble gases are in group 18, and are best known because they are...
unreactive
rare
lanthanides
excellent conductors
62
A three-dimensional region around the nucleus that indicates the probable location of an electron.
orbital
capsule
areanatal
shell
63
A mutual electrical attraction between the nuclei and valence electrons of different atoms
chemical bond
dipole
London force
Lewis structure
64
According to the octet rule, this atom wants to...
Lose 2 e-
Gain 2 e-
Gain 1 e-
Lose 1 e-
65
What is a positively charged subatomic partical
Proton
Atom
Electron cloud
Nuetron
66
What is the energy required to break a chemical bond called?
bond energy
Gibbs Free energy
nuclear energy
lattice energy
67
Define the octet rule
All atoms have 8 electrons in the valence shell
Most atoms do not form bonds
A full valence shell of electrons is the most stable
Atoms must have 8 electrons to bond
68
Is this a physical or chemical change?
Physical
Chemical
69
What bond type does a small electronegativity difference (<0.5) lead to
non-polar covalent bond
friendly bond
ionic bond
polar covalent bond
70
4052 kg has _____ number of significant figures?
4
2
5
3
71
What is a quantitative observation?
an observation that involves describing
an observation that involves a number or measurement
72
How many valence electrons does Nitrogen have?
5
7
1
9
73
Bonding in molecules or ions that cannot be correctly represented by a single Lewis structure
double bonding.
polyatomic.
single bonding.
resonance.
74
The weighted average of the atomic masses of the naturally occurring isotopes of an element.
Average atomic mass
Median atomic mass
Atomic number
Mass number
75
Which is an extensive property of matter
Boiling point
Melting point
Density
Volume
76
The periodic table has vertical columns called ________
Rows
Tables
Groups/ families
Periods
77
Flourine, Chlorine, Bromine, and Iodine are all elements belonging to which family?
Transition Metals
Halogens
Alkalai Metals
Noble Gasses
78
A measure of the quantity of matter is...
mass
force
density
weight

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