What are the types of physical properties?

Intensive physical property, Extensive Physical property

If a compound has more electrons than prontons,

The net charge on the atom is negative, It is an anion

What are protons? select 2

positively charged, Found in the nucleus

atoms that gained or lost electrons & have a net electrical charge

What is chemistry? select 2

Studies composition, properties, and behavior at the atomic level, studies matter

Which statement is true about electrostatic bonds?(all that apply)

Electrons get transferred from on atom to another, Metals lose an electron and Non-metals gain an electron, Opposites attract

What is a physical change? (all that apply)

a change in matter that occurs without changing the chemical makeup, Ice cube melts

what is a proton? select all that apply

Approx 1 atomic mass unit AMU, larger than electrons, correspond to the atomic number

What is a Covalent Bond?

Physical sharing of 1 or more pairs of electrons

Fluids, minimally compressible, may change volume with pressure and temp

Covalent Bonds (all that apply)

It is a molecular compound, nonmetals that forms a bound and share electrons with each other, The sharing of 1-pair of electrons called a single bond

If an compound has fewer electrons than protons,

the net charge on the atom is positive, It is a cation

Which statements are true about molecules? (select all that apply)

Molecules that consist of only one kind of atom are elements, Consist of 2 or more atoms chemically bonded, Most molecules are compounds

What is a hydrogen bond?

It is only possible when an atom is directly bonded to F,O or N

A pure subtance (all that apply)

Could also be a compound, is called an element, Consist of only one kind of atom

one element w/ identical # of protons but different # of neutrons

What is an Ion-Dipole attraction?

Occurs between an ion and a polar molecules

What is an Ionic Compound? (all that apply)

comprised of cations & anions bonded together, also called a salt

Which statement is true about Ion-Dipole attractions? (all that apply)

Unequal distribution of e- within the molecule, It is weaker than Ion-Ion bonding, The attraction force varies and depends in the magnitude of the dipole

What is a London Force?

Created whenever e- in a molecule are unevenly distributed

consists of a single type of atom

comprised of more than one kind of atom in a fixed ratio by mass

What are the different types of electrostatic bonds?(all that apply)

Dipole-Dipole, Ion-Dipole, Ion-Ion

Nonmetals can be (all that apply)

are nonconductors of electricity and heat, solid, liquid or gases, Tend to form anions

Elements are pure subtances which:

Have no charge and have an equal # of protons and electrons

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Chemistry test 3

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Questions 100

Answers

1
What is a polar Covalent Bond?
Electrons are transferred
Electrons are shared unequally
They are Diatomic molecules usually
Electrons are shared equally
2
All matter is composed of atoms
False
True
3
What are the types of physical properties?
Chemical physical property
Intensive physical property
all of the above
Extensive Physical property
4
If a compound has more electrons than prontons,
The net charge on the atom is negative
It is an anion
It is an cation
The net charge on the atom is positive
5
What are protons? select 2
Found out of the nucleus
Negatively charge
positively charged
Found in the nucleus
6
Which formula will give you the number of neutrons in an atom?
Atomic weight - Atomic number
Atomic number -Atomic weight
Atomic mass number + Atomic weight
Atomic mass number- Atomic weight
7
what is the atomic number of carbon?
6 neutrons
6 electrons
6 protons and neutrons
6 protons
8
Which elements give up 1 or 2 electrons to achieve a noble gas like electron configuration?
Metals
Nonmetals
Metalloid
Noble gas
9
These groups have a number of valence electrons equal to the group number
rows
B-groups
A-groups
Columns
10
What is the charge of a dipole molecule?
Neutral
Negative
Positive and Negative
Posivitive
11
What is a ion?
comprised of more than one kind of atom in a fixed ratio by mass
a group of two or more atoms held together by a chemical bond
consists of a single type of atom
atoms that gained or lost electrons & have a net electrical charge
12
What is chemistry? select 2
Studies composition, properties, and behavior at any level
Studies composition, properties, and behavior at the atomic level
studies EMW
studies matter
13
Physical properties can't be observed
True
False
14
Which statement is true about electrostatic bonds?(all that apply)
Electrons get transferred from on atom to another
Metals lose an electron and Non-metals gain an electron
Opposites attract
Metals gain an electron and Non-metals lose an electron
15
Na has 11 protons, therefore since it is a neutral elment, How many electrons does it have?
10
12
11
8
16
What is a physical change? (all that apply)
a change in matter that occurs without changing the chemical makeup
H2O + electrical current= H & O2
change in matter that results in a chemically different substances
Ice cube melts
17
what is a proton? select all that apply
Approx 1 atomic mass unit AMU
larger than electrons
correspond to the atomic number
Correspond to the atomic weight
18
On the periodic table, where are the Nonmetals located?
right side
the middle
left side
at the bottom
19
What is a Covalent Bond?
Transfer of 1 or more pairs of electrons
Physical sharing of 1 or more pairs of electrons
electrostatic bonds when electrons get transferred from one atom to another
Electrons are shared equally
20
On the periodic table, where are the metals located?
At the bottom
In the middle
left side
right side
21
What is a liquid?
Resists changes in shape and volume
A mixture of ionized gas and free-floating electrons
Fluids, minimally compressible, may change volume with pressure and temp
Compressible, and easily changes volume in changes in pressure and temp
22
What are examples of Covalent Bonds? (all that apply)
KCl
O2
H2O
NaCl
23
What is a anion ? (all that apply)
has a positive charge
has a negative charge
Ca+2
Cl-
24
Covalent Bonds (all that apply)
It is a molecular compound
nonmetals that forms a bound and share electrons with each other
Weaker than electrostatic bonds
The sharing of 1-pair of electrons called a single bond
25
If an compound has fewer electrons than protons,
the net charge on the atom is positive
It is a cation
the net charge on the atom is negative
It is an anion
26
Which statements are true about molecules? (select all that apply)
Molecules that consist of only one kind of atom are elements
They are not compounds
Consist of 2 or more atoms chemically bonded
Most molecules are compounds
27
Halogen gases used in the OR to make other gasses less flammable
False
True
28
What is a hydrogen bond?
It is an attraction between the opposite(partial)charges of polar molecules
Created whenever e- in a molecule are unevenly distributed
Occurs between an ion and a polar molecules
It is only possible when an atom is directly bonded to F,O or N
29
A pure subtance (all that apply)
Has more than one atom
Could also be a compound
is called an element
Consist of only one kind of atom
30
Each element is defined by the number of:
electrons
protons and neutrons
Protons
Neutrons
31
What is an isotope?
one element w/ identical # of neutrons but different # of electrons
one element w/ identical # of neutrons but different # of neutrons
one element w/ identical # of protons but different # of electrons
one element w/ identical # of protons but different # of neutrons
32
What are examples of Ionic Compounds? (select all that apply)
LiCl
NaCl-
HCO3 -
NaCl
33
What is an Ion-Dipole attraction?
Created whenever e- in a molecule are unevenly distributed
Occurs between an ion and a polar molecules
It is only possible when an atom is directly bonded to F,O or N
It is an attraction between the opposite(partial)charges of polar molecules
34
What is an Ionic Compound? (all that apply)
comprised of cations & anions bonded together
comprised of more than one kind of atom in a fixed ratio by mass
Has a negative charge
also called a salt
35
Which statement is true about Ion-Dipole attractions? (all that apply)
equal distribution of e- within the molecule
Unequal distribution of e- within the molecule
It is weaker than Ion-Ion bonding
The attraction force varies and depends in the magnitude of the dipole
36
What is a solid?
mixture of ionized gas and free-floating electrons
fluids with minimal or no compressibility
fluids, but compressible and easily change volume
fixed shape and volume
37
What is a London Force?
It is only possible when an atom is directly bonded to F,O or N
Created whenever e- in a molecule are unevenly distributed
Occurs between an ion and a polar molecules
It is an attraction between the opposite(partial)charges of polar molecules
38
What some examples of chemical properties? (all that apply )
Oxidation
Boiling point
toxicity
melting point
39
What is an element ?
comprised of more than one kind of atom in a fixed ratio by mass
consists of a single type of atom
a group of two or more atoms held together by a chemical bond
an atom or a group of atoms bonded together & net electrical charge
40
What is a compound?
consists of a single type of atom
an atom or a group of atoms bonded together & net electrical charge
comprised of more than one kind of atom in a fixed ratio by mass
a group of two or more atoms held together by a chemical bond
41
What are the different types of electrostatic bonds?(all that apply)
Dipole
Dipole-Dipole
Ion-Dipole
Ion-Ion
42
What is the most abundant element in the universe?
Hydrogen
Iron
Carbon
Nitrous Oxide
43
Nonmetals can be (all that apply)
On the left side of the periodic table
are nonconductors of electricity and heat
solid, liquid or gases
Tend to form anions
44
Which element acquired 1 to 2 extra electrons to achieve a noble gas like an electron configuration?
Metalloid
Metals
Nonmetals
Noble gas
45
What is a cation ? (all that apply)
Ca+2
Cl-
has a negative charge
has a positive charge
46
What elements have a filled outer valence shell?
metalloids
Nonmetals
Metals
Noble gases
47
Covalent bonds are often stronger than electrostatic bonds
True
False
48
Elements are pure subtances which:
Have a charge and have an equal # of protons and electrons
Have no charge and have an equal # of protons and electrons
Have no charge and have an equal # of neutrons and electrons
Have no charge and have an equal # of protons and neutrons
49
What is the name of this structure?
Lewis Structure
Skeletal diagrams
Intermolecular Bonding
Molecular Bonding
50
Select the elements (all that apply)
N2
H2O
O2
Mg
51
What are some examples of Nonpolar Covalent Bond? (all that apply )
H2
N2
CO2
H2O
52
What are examples of Ion-Ion? (select all that apply)
O2
NAL
NaCl
LiF
53
What is the name of this structure?
Molecular Bonding
Lewis Structure
Intermolecular Bonding
Skeletal diagrams
54
Ion compounds are formed between?
nonmetal+ nonmetals
metal +metal
metal + nonmetals
cations + cations
55
What is a chemical change?
Change in atom that occurs w/o changing the chemical makeup
Change in matter that results in the formation of a different subtance
Change in matter that occurs w/o changing the chemical makeup
Change in the charge that results in the formation of a different subtance
56
What is a molecular compound?
a group of two or more atoms held together by a chemical bond
comprised of more than one kind of atom in a fixed ratio by mass
consists of a single type of atom
an atom or a group of atoms bonded together & net electrical charge
57
What is an Ion?
It is a molecular compound with a charge
It is an single atom with a charge
It is an atom or group of atoms with a charge
It is an atom or group of atoms without a charge
58
What is an element? select all that apply
Ne
H2O
consists of a single type of atom
some elements exist in nature as molecules
59
What is an example of an Ion?
Cl
Cation
Anion
Polyatomic
60
What is a Polyatomic Ion? (all that apply)
Have a net charge
NO2+3
a group of 2 or + atoms covalently bonded together behave as a single unit
NaCl
61
which statements are true? (all that apply)
Each shell from innermost to outermost increases in energy
There is not a max number of electrons that each shell can hold
There is a max number of electrons that each shell can hold
Each shell from inner to outer decreases in energy
62
Which column is contain the noble gases?
6A
1A
7A
8A
63
What is a physical change?
Change in matter that occurs w/o changing the chemical makeup
Change in matter that results in the formation of a different subtance
Change in atom that occurs w/o changing the chemical makeup
Change in the charge that occurs w/o changing the chemical makeup
64
What are the horizontal rows called?
rows
columns
groups
periods
65
What are vertical columns called?
groups
periods
rows
columns
66
What are the principles of intermolecular Forces?(all that apply)
Dipole-Dipole
Hydrogen Bonding
London forces
Polar and Nonpolar
67
What does the Lewis Structure represents?
Lines between atoms represent shared pairs of electrons in covalent bonds
The dot are not the covalent bonds
Frequently used in organic chemistry
Dots or lines are the e-
68
What are some examples of Physical property? (all that apply)
Density
Flammability
Melting point
Color
69
Dalton's Atomic theory includes: select all that apply
Compounds are formed by bonding atoms together in a fixed ratio
Elements are composed of tiny, invisible particles
Chemical reactions don't create, destroy or change atoms
all atoms of an element are identical and unique
70
what is a neutron? select all that apply
Correspond to the atomic mass
electrically neutral
larger than electrons
Approx mass is 1 AMU
71
An isotope has
Same atomic weight but different atomic number
Same atomic mass number but different atomic weight
Same mass number but different atomic number
Same atomic number but a different mass number
72
What is an atom? select 2
is the fundamental building block of matter
largest unit of matter, retains all chemical properties of an element
smallest unit of matter, retains all chemical properties of an element
is not the fundamental building block of matter
73
Which shell containts the valence electrons?
First electron shell
Outermost shell
Subshell
Innermost shell
74
What is an isotope? select 2
2 atoms of the same element with a different number of neutrons
Different mass number, but the same atomic number (neutrons)
2 atoms of the same element with a different number of protons
It has different mass number, but the same atomic number(protons)
75
What are the different types of covalent Bonds? (all that apply)
Ion compound
Polar
Ion-Ion
Non-polar
76
What is a chemical change? (all that apply)
a change in matter that occurs without changing the chemical makeup
change in matter that results in a chemically different substances
H2O + electrical current= H2 & O2
Ice cube melts
77
Metals can be (all that apply)
Tend to for anion
are conductors of electricity and heat
Tend to form cations
are nonconductors of electricity and heat
78
The element in the horizontal rows have
the same number of e- shells
The same chemical properties
The same physical properties
Similar chemical and physical properties
79
Which statements are true about shells?
Electrons must fill the lower/inner shells first
Each shell is only given a different letter
Electrons must fill the higher/outer shells first
Each shell is given a n value
80
which statements are true about halogens?
Increase toxicity
Increase flammability
Eliminate flammability
Decrease toxicity
81
A pure Subtance can be separated into its components through physical changes
True
False
82
What is matter?
Anything with mass that occupies space
Anything with mass that does not occupies space
Studies composition, properties, and behavior at the atomic level
The study of atoms
83
The element in the vertical columns have
the same number of e- shells
The same physical properties
Similar chemical and physical properties
The same chemical properties
84
What is a gas?
Resists changes in shape and volume
fluid, compressible, & easily changes volume w/ changes in pressure & temp
Fluids, minimally compressible, may change volume with pressure and temp
A mixture of ionized gas and free floating electrons
85
what are molecules? select all that apply
molecules are electrically neutral
Fe
H2O
N2
86
As elements move from the left to the right upper side, the electronegativity increases
True
False
87
What are molecules? select all that apply
molecules are not electrically neutral
a group of two or more atoms held together by a covalent bond
a group of two or more atoms held together by a chemical bond
Molecular compounds
88
What is density ?
The ratio of the mass of an object to its volume
It is a measurement of friction
The ratio between an object's density & the density of water
It measures the amount of e-
89
Ionic compounds consist of (select all that apply )
anions
Cations
They are not molecules
They have more than one kind of atom
90
What is an Electrostatic bond?
attraction of neutrons between atoms due to neutrons distribution
attraction of protons between atoms due to protons distribution
attraction of elecctrons between atoms due to electron distribution
attraction of protons between atoms due to electron distribution
91
Each shell can only have a set number of electrons
True
False
92
What some examples of physical properties? (all that apply )
melting point
Boiling point
Oxidation
toxicity
93
The valence shell
Contains 8 neutrons
needs at least 8 electrons
The A period # represents the number of valence electrons
The A group # represents the number of valence electrons
94
What identifies the element ?
The atomic number
The atomic weight
The number of electrons
The number of atoms
95
What is the atomic number?
the number of protons within the nucleus
the average of atomic numbers
the number of electrons within the nucleus
average of the atomic masses
96
What is a Dipole-Dipole attraction?
It is only possible when an atom is directly bonded to F,O or N
Created whenever e- in a molecule are unevenly distributed
Occurs between an ion and a polar molecules
It is an attraction between the opposite(partial)charges of polar molecules
97
What is the most versatile element in the universe?
Nitrous Oxide
Hydrogen
Carbon
Iron
98
What are some examples of Polyatomic Ions?
HCO3-
OH-
Cl-
NO2-3
99
Atoms with unpaired valence electrons are? (all that apply )
tend to form chemical bonds
Reactive
tend not to form chemical bonds
Nonreactive
100
what is an electrons? select all that apply
negatively charged
mass is typically ignored
Correspond to the atomic weight
smaller than protons

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