Chemical Bonding
Chunky Boards!!!!
Fill in the blanks:
What occurs as two atoms of bromine combine
to become a molecule of bromine?
Energy is _________ as a bond is ________.
Energy is released as a bond is formed.
Given a formula for oxygen:
O2
What is the total number of electrons shared
between the atoms represented in this formula?
4
Which formulas represent two polar molecules?
A. CO2 and HCl
B. CO2 and CH4
C. H2O and HCl
D. H2O and CH4
Which formula represents a molecular
compound?
A. Kr
B. LiOH
C. N2O4
D. NaI
Which substance is made up of molecules that
are dipoles? Why?
H2O
CH4
N2
CO2
Fill in the blanks:
The bonds in BaO are best described
as ________,
because valence electrons are ________.
The bonds in BaO are best described
as ionic,
because valence electrons are transferred.
Which formula represents a nonpolar molecule?
A. CH4
B. HCl
C. H2O
D. NH3
The chemical bonding in sodium phosphate,
Na3PO4, is classified as _________. Why?
A. ionic, only
B. metallic, only
C. both covalent and ionic
(It contains a polyatomic ion)
D. both covalent and metallic
• Which element is composed of molecules that
each contain a multiple covalent bond?
A. chlorine
B. fluorine
C. hydrogen
D. nitrogen
Which type of substance can conduct electricity
in the liquid phase but not in the solid phase?
ionic compound
The relatively high boiling point of water is due
to water having which IMF?
hydrogen bonding
Which of the following is a property of network
solids, but not of molecular solids?
A.
B.
C.
D.
water soluble
electrical insulators
high malleability
high melting points
What type of bond contains positive ions
immersed in a sea of mobile electrons?
metallic bond
Which element has an atom with the greatest
tendency to attract electrons in a chemical bond?
A. Carbon
B. Chlorine
C. Silicon
D. Sulfur
The nitrogen atoms in a molecule of N2 share a
total of how many pairs of electrons?
3
Hydrogen bonding is a type of
A. strong covalent bond
B. weak ionic bond
C. strong intermolecular force
D. weak intermolecular force
What type of bond is formed by unequal sharing
of valence electrons?
polar covalent bond
What type of bond is formed when the
electronegativity difference between two atoms
is greater than or equal to 1.7?
ionic bond
Helium may be liquefied at low temperature and
high pressure primarily because of __________
________ .
dispersion forces
(or weak intermolecular forces).
Two categories of compounds are
(Hint: Think about the two types of bonds)
ionic and molecular
What type of bond is formed when the
electronegativity difference between two atoms
is greater than 0.4, but less than 1.7?
polar covalent bond
Which type of bond is found between atoms of
solid cobalt?
metallic
Which is the best conductor of electricity?
A. NaCl (Sodium Chloride)
B. Cu (Copper)
C. H2O (Water)
D. Br2 (Bromine)
Fill in the blanks:
Nonmetals such as Cl combine with metals such
as Na by _______ electrons to form
________ compounds.
gaining electrons to form ionic compounds
Fill in the Blank:
When a chemical bond is broken,
energy is ________.
absorbed
Three examples of network solids are:
diamond, quartz and silica SiO2
Why Br2 is a liquid at STP and I2 is a solid at STP?
Molecules of I2 have stronger intermolecular
forces than molecules of Br2.
An ionic bond can be formed when one or more
electrons are ____________ .
transferred from the valence shell of one atom
to the valence shell of another atom.
At standard pressure, CH4 boils at 112 K and H2O
boils at 373 K. What accounts for the higher
boiling point of H2O at standard pressure?
hydrogen bonding
Which Lewis electron-dot diagram
represents a molecule having a nonpolar
covalent bond?
Which Lewis electron-dot diagram
represents a molecule having a polar
covalent bond?
Which Lewis electron-dot diagram
represents a molecule having an ionic
bond?
What type of bond is formed by equal sharing of
valence electrons?
nonpolar covalent bond