AnswersPhysical ScienceChemical Bonding

Chemical Bonding — Test Answers

22 verified answers
1
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What best explains whether bromine Br or neon Ne is more likely to form a covalent bond?

A
Neon forms covalent bonds because it can share its valence electrons, but bromine has seven valence electrons and can gain only one more electron.
B
Neon forms covalent bonds because it has only two electron shells, but bromine has many electron shells and will lose electrons in order to fulfill the octet rule.
C
Bromine forms covalent bonds because it has seven valence electrons, but neon has eight valence electrons and already fulfills the octet rule.
D
Bromine forms covalent bonds because it has many electron shells, but neon has only two electron shells and is tightly bound to its electrons.
2
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A __________ at the bottom right side of a chemical symbol represents the number of each type of ion in the chemical formula of an ionic compound. Which best completes the statement?

A
product
B
coefficient
C
subscript
D
superscript
3

How many atoms of each element are in the chemical formula Ca OH sub 2 ?

A
1 calcium, 2 oxygen, and 2 hydrogen
B
2 calcium, 1 oxygen, and 2 hydrogen
C
2 calcium, 2 oxygen, and 2 hydrogen
D
1 calcium, 1 oxygen, and 1 hydrogen
4

"Na2⁢SO3” represents sodium sulfite. What does the 4 mean in the formula 4 Na sub 2 SO sub 3 ?

A
There are four molecules of sodium sulfite.
B
There are four elements in sodium sulfite.
C
There are four atoms of sodium.
D
There are four atoms of sodium sulfite.
5

Which refers to a macromolecule that forms as a result of the joining of multiple monomers?

A
glucose
B
nucleic acid
C
amino acid
D
polymer
6

What prefix should be used for the oxygen atom when naming the chemical formula SO sub 2 ?

A
pent-
B
mono-
C
di-
D
tri-
7

What is necessary for a metallic bond to form?

A
The nuclei must contain neutrons.
B
The atoms should be far apart.
C
The atoms should be in close proximity.
D
The electrons must be attracted to each other.
8

Shameeka is studying for an exam. She took the notes about calcium and chlorine, which are known to form ionic bonds. Calcium, which is a metal, donates 2 electrons to chlorine. The individual calcium atoms become ions with a negative 2 charge. The bond between calcium and chlorine makes the atoms stable. Calcium and chlorine attract each other. Which best describes Shameeka’s error?

A
Calcium and chlorine repel, not attract, each other.
B
The individual calcium atom has a positive, not negative, 2 charge.
C
The bond formed makes the atoms unstable, not stable.
D
Calcium is a metal, so it donates protons, not electrons.
9

Which are long chains formed by the process of polymerization?

A
ethylenes
B
monomers
C
subunits
D
DNA strands
10

When the chemical name of a compound is being written, the subscripts will determine the

A
suffixes.
B
prefixes.
C
elements.
D
symbols.
11

What does the octet rule state that explains why atoms bond?

A
An atom bonds to lose eight valence electrons to become unstable.
B
An atom bonds to lose eight valence electrons to become stable.
C
An atom bonds to have eight valence electrons to become stable.
D
An atom bonds to have eight valence electrons to become unstable.
13

The table describes the properties of four compounds. Compound Property A B C D Melting Point High Low Low High Boiling point High Low Low High Does the compound dissolve in water? Yes Yes Yes Yes Can the compound conduct electricity? Yes Yes, but poorly. No Yes Which compounds are most likely ionic?

A
compounds C and D
B
compounds A and B
C
compounds B and C
D
compounds D and A
14

An atom of lithium Li forms an ionic bond with an atom of chlorine Cl to form lithium chloride. How are the valence electrons of these atoms rearranged to form this bond?

A
Electrons are transferred from the chlorine atom to the lithium atom.
B
Many valence electrons are shared between the atoms.
C
Electrons are transferred from the lithium atom to the chlorine atom.
D
A few valence electrons are shared between the atoms.
15

What is used to determine the number of a type of atom in a compound based on the chemical name?

A
prefixes
B
the periodic table
C
the IUPAC
D
chemical symbols
16

To what extent do covalent compounds conduct electricity?

A
never
B
rarely
C
usually
D
always
17

Which is a characteristic of all ions?

A
They are made of two or more types of atoms.
B
They form chemical bonds through electron sharing.
C
They are metals.
D
They have a charge.
18

Sodium and phosphorus combine to form Na 3 cap p What is the name of this compound?

A
sodium phosphide
B
phosphorus sodide
C
phosphorus sodiate
D
sodium phosphate
19

Which describes the substances that form covalent bonds?

A
two nonmetals
B
a metal and a metalloid
C
a metal and a nonmetal
D
two metals
20

When looking at the chemical symbol, the charge of the ion is displayed as the

A
subscript.
B
coefficient.
C
superscript.
D
product.
21

Because of metallic bonding, when light is pointed at metals, they become

A
shiny.
B
ductile.
C
malleable.
D
conductive.

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