WorksheetsIons, Bonding, and Compounds
Total questions: 30
Worksheet time: 22mins
Which equation represents energy being absorbed as a
bond is broken?
H + H --> H2
H2 (g) --> H2 (s)
H2 (s) --> H2 (g)
H2 --> H + H
Which statement describes the energy changes that occur as bonds are broken and formed during a chemical reaction?
Energy is absorbed when bonds are both broken and formed.
Energy is released when bonds are both broken and formed.
Energy is absorbed when bonds are broken, and energy is released when bonds are formed.
Energy is released when bonds are broken, and energy is absorbed when bonds are formed.
Given the equation representing a reaction:
O + O --> O2
Which statement describes the changes that occur as
the oxygen molecule is produced?
Energy is absorbed as bonds are broken.
Energy is absorbed as bonds are formed.
Energy is released as bonds are broken.
Energy is released as bonds are formed.
Given the equation representing a reaction:
H2(g) + I2(g) —> 2HI(g)
Which statement describes the energy changes
that occur in this reaction?
Energy is absorbed as bonds are formed, only.
Energy is released as bonds are broken, only.
Energy is absorbed as bonds are formed, and
energy is released as bonds are broken.
Energy is absorbed as bonds are broken, and
energy is released as bonds are formed.
Which element reacts with oxygen to form ionic
bonds?
calcium
hydrogen
chlorine
nitrogen
Which term is used to describe the attraction that an
oxygen atom has for the electrons in a chemical bond?
alkalinity
electronegativity
electron configuration
first ionization energy
Which property is used to determine the degree of
polarity between two bonded atoms?
density
electronegativity
pressure
temperature
Which bond is least polar?
As-Cl
Bi-Cl
P-Cl
N-Cl
If the electronegativity difference between the
elements in compound NaX is 2.1, what is element X?
bromine
chlorine
fluorine
oxygen
Which type of bonding is usually exhibited when the
electronegativity difference between two atoms is
1.1?
ionic
covalent
metallic
network
Which compound has the least ionic character?
KCl
CaCl2
AlCl3
CCl4
Which compound would have the greatest degree of
ionic character?
Na2O
H2O
CO2
NO2
As the difference in electronegativity between two
atoms decreases, the tendency for the formation of
covalent bonds
decreases
increases
remains the same
When an atom gains a valence electron, it becomes a(n) _____________ ion.
positive
negative
neutral
When an atom loses a valence electron, it becomes a(n) _____________ ion.
positive
negative
neutral
What is the charge of a sodium ion?
+2
+1
-1
-2
What subatomic particle changes in an ion?
The number of electrons
The number of protons
The number of neutrons
A sodium atom (Na) loses an electron to form a sodium ion (Na+1). Which statement is correct in regards to describing the ionic radius.
The sodium ion (Na+1) has a larger radius than the neutral sodium atom (Na).
The sodium ion (Na+1) has a smaller radius than the neutral sodium atom (Na).
The sodium ion (Na+1) and the neutral sodium atom (Na) are the same size because they are both sodium.
The sodium ion (Na+1) has twice the radius of the neutral sodium atom (Na).
The electrons in a polar covalent molecule are shared...
Evenly
Unevenly
Electrons are not shared
None of the Above
A diatomic molecule like O2 is always _____ because electrons are shared _____
nonpolar; unequally
polar; equally
nonpolar; equally
polar; unequally
What must the difference in electronegativity between two atoms be in order for the bond between them to be nonpolar covalent?
less than 0.4
greater than 1.7
between 0.4 and 1.7
exactly 0
What type of bond involves the sharing of electrons between atoms?
covalent bond
ionic bond
metallic bond
transfer bond
