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WorksheetsUnit 3 - Chemical Bonding
Total questions: 35
Worksheet time: 18mins
When an atom gives up electrons it will become an ion with an overall positive charge. Positive ions are also called...
cations
anions
isotopes
isomeres
When an atom gains electrons it will become an ion with an overall negative charge. Negative ions are also called...
cations
anions
isotopes
isomers
Which pair of elements form an ionic bond with each other?
KCl
ICl
PCl
HCl
When a reaction occurs between atoms with ground state electron configurations 1s22s1 and 1s22s22p5, which type of bond is expected to form?
polar covalent
ionic
nonpolar covalent
metallic
The greatest degree of ionic character (the most ionic bond) would be found in bond between sulfur (EN=2.5) and
oxygen (EN=3.5)
bromine (EN=2.8)
chlorine (EN=3.0)
phosphorus (EN=2.1)
Which compound contains bonds with the least ionic character?
CO
CaO
Li2O
K2O
Which molecule contains the shortest covalent bond?
HBr
Br2
H2
Cl2
Which molecule contains a nonpolar covalent bond?
HF
O2
CO2
NH3
Which type of bond is predominant in a water molecule?
polar covalent
nonpolar covalent
metallic
ionic
In a molecule of NH3 there are three single bonds and a lone pair of electrons. The molecular shape of this molecule would be
planar
trigonal pyramidal
tetrahedron
trigonal planar
The table above lists four different bonds and their bond energy. Which bond is the weakest (most easily broken)?
H-F
H-Cl
H-Br
H-I
In a nonpolar covalent bond, electrons are
located in a "sea" of electrons shared by many ions
transferred from one atom to another
shared equally between two atoms
shared unequally between two atoms
A solid substance at room temperature was found to be malleable, ductile and a good electrical conductor. This material is most likely a(n)...
network solid
coordinate compound
metallic solid
ionic solid
What type of bond forms between two atoms of chlorine?
polar covalent
nonpolar covalent
ionic
metallic
Metallic bonding would occur between atoms of
carbon
sulfur
neon
copper
The ability to conduct electricity in the solid state is a characteristic of metallic bonding. This characteristic is best explained by the presence of
high ionization energies
high electronegativities
delocalized mobile electrons (like a sea of electrons)
mobile photons
Hydrogen bonding is the strongest between the atoms in which of the following molecules?
H2O
HF
HCl
H2S
A characteristic of ionic solids is that they have...
conduct electricity
low boiling points
a non-crystalline structure
high melting points
Which of the following compounds has intermolecular forces due to London Dispersion or Van der Waals forces?
CH4
NaCl
NH3
Al
Which of the following substances would require the highest temperature to melt?
H2O
NH3
NaCl
CH4
Which of the atoms below would have the strongest attraction for a pair of electrons when bonding with oxygen?
Al
Si
P
S
When an atom of a metal bonds with an atom of a nonmetal, the metal atom will...
lose electrons and decrease in size
lose electrons and increase in size
gain electrons and decrease in size
gain electrons and increase in size
Which element in Period 2 has the greatest tendency to produce an anion (negative ion)?
Li
F
C
Ne
As the elements in Group 17 are considered from top to bottom, the number of electrons in the valence shell will...
remain the same
increase
decrease
none of these
Which element in Group 2 has the highest ionization energy?
Be
Mg
Ca
Ba
Which element in Period 2 is the most reactive non-metal?
O
C
N
F
Which element in Period 3 is least likely to lose an electron?
Ar
P
Al
Na
Which of the following electron configurations represents a neutral atom that has the greatest nuclear charge?
1s22s22p6
1s22s22p63s23p5
1s22s22p63s23p4
1s22s22p63s1
An atom of an element contains 20 protons, 20 neutrons and 20 electrons. The element is
an alkali metal
an alkaline earth metal
a halogen
a noble gas
Given this Lewis Structure, what is the shape of the molecule?
tetrahedral
linear
trigonal planar
trigonal pyramidal
Which type of bonding or intermolecular forces are the weakest?
hydrogen bonding
dipole-dipole
London dispersion forces
covalent bonding
Which element will form covalent bonds with chlorine?
carbon
aluminium
magnesium
potassium
An unknown substance is tested in the laboratory. The physical test results are listed below.
Nonconductor of electricity
Insoluble in water
Soluble in oil
Low melting point
Based on these results, how are the atoms in the unknown substance bonded?
ionic and nonpolar
ionic and polar
covalent and polar
covalent and nonpolar
Which of the following is true of an electron that drops from n=4 to n=1?
it will emit energy in the UV spectrum
it will emit energy in the visible spectrum
it will emit energy in the IR spectrum
it will not emit any energy
You have a 800g sample of C-14. If the half-life is 2 years, how much will be left after it decays for 10 years?
12.5g
25g
50g
100g
